Document

Exhibit 4.6

DESCRIPTION OF SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934
The following description of our share capital is a summary and does not purport to be complete. It is subject to and qualified in its entirety by reference to our sixth amended and restated memorandum and articles of association (as amended or amended and restated, “our articles”), which is incorporated by reference as an exhibit to the Annual Report on Form 10-K (“Annual Report”). The terms “we,” “our,” and “us” refer solely to BeiGene, Ltd. and not its subsidiaries.
Ordinary Shares
We are an exempted company incorporated in the Cayman Islands with limited liability and our affairs are governed by our articles, the Companies Act (as amended) of the Cayman Islands (the “Cayman Companies Act”) and the common law of the Cayman Islands.
As of February 25, 2022, our authorized share capital was $1,000,000 divided into (i) 9,500,000,000 ordinary shares of a par value of $0.0001 each and (ii) 500,000,000 shares of a par value of $0.0001 each of such class or classes (howsoever designated) as the board of directors may determine.
Our articles were adopted by special resolution passed on June 16, 2021 with effect from the listing of our ordinary shares traded in Renminbi (the "RMB Shares") on the Science and Technology Innovation Board (the "STAR Market") of the Shanghai Stock Exchange (the "SSE") on December 15, 2021. The following are summaries of material provisions of our articles and the Cayman Companies Act insofar as they relate to the material terms of our ordinary shares. Under our articles, our name is BeiGene, Ltd.
The following discussion primarily concerns ordinary shares and the rights of holders of ordinary shares. The holders of American Depositary Shares (“ADSs”) are not be treated as our shareholders and will be required to surrender their ADSs for cancellation and withdrawal from the depositary facility in which the ordinary shares are held in accordance with the provisions of the deposit agreement, as amended, in order to exercise directly shareholders' rights in respect of the ordinary shares. The depositary has agreed, so far as it is practical, to vote or cause to be voted the amount of ordinary shares represented by ADSs in accordance with the written instructions of the holders of such ADSs. See “Description of American Depositary Shares—Voting Rights.”
Our ordinary shares are listed on The Stock Exchange of Hong Kong Limited (the “HKEx”) under the stock code “06160”. Our ADSs representing our ordinary shares are listed on the NASDAQ Global Select Market (the “NASDAQ”) under the symbol “BGNE”. Our RMB Shares are listed on the STAR Market of the SSE under the stock code "688235".
General
All of our issued and outstanding ordinary shares are fully paid and non-assessable. Our ordinary shares are issued in registered form and are issued when registered in our registers of members. Each holder of our ordinary shares will be entitled to receive a certificate in respect of such ordinary shares if our directors resolve that share certificate shall be issued. Our shareholders who are non-residents of the Cayman Islands may freely hold and vote their ordinary shares. We may not issue shares to bearer.
Our registers of members holding ordinary shares (other than the RMB Shares) are maintained by our principal share registrar, Mourant Governance Services (Cayman) Limited, in the Cayman Islands, and by our Hong Kong share registrar, Computershare Hong Kong Investor Services Limited, in Hong Kong, respectively. Our register of members holding RMB Shares are maintained by China Securities Depository and Clearing Corporation Limited in China.
Although the RMB Shares are of the same class and have the same rights as our ordinary shares listed on the HKEx, the RMB Shares are not fungible with our ordinary shares listed on the HKEx or our ADSs representing our ordinary shares listed on the NASDAQ, and in no event will any RMB Shares be able to be converted into our ordinary shares listed on the HKEx or our ADSs listed on NASDAQ, or vice versa.








Dividends
The holders of our ordinary shares are entitled to such dividends as may be declared by our board of directors. In addition, our shareholders may by ordinary resolution declare a dividend, but no dividend may exceed the amount recommended by our directors. Under Cayman Companies Act, a Cayman Islands company may pay a dividend out of either profit or share premium account, provided that in no circumstances may a dividend be paid if this would result in the company being unable to pay its debts as they fall due in the ordinary course of business.
Voting Rights
Each ordinary share is entitled to one vote on all matters upon which the ordinary shares are entitled to vote.
Voting at any meeting of shareholders is by poll.
An ordinary resolution to be passed by the shareholders requires the affirmative vote of a simple majority of the votes cast by the shareholders entitled to vote who are present in person or by proxy at a general meeting, while a special resolution requires the affirmative vote of at least two-thirds of the votes cast by the shareholders entitled to vote who are present in person or by proxy at a general meeting (except for certain types of winding up of the company, in which case the required majority to pass a special resolution shall be 100%). Both ordinary resolutions and special resolutions may also be passed by a unanimous written resolution signed by all the shareholders of our company, as permitted by the Cayman Companies Act and our articles. A special resolution is required for important matters such as a change of name and amendments to our articles. Our shareholders may effect certain changes by ordinary resolution, including increasing the amount of our authorized share capital, consolidating and dividing all or any of our share capital into shares of larger amounts than our existing shares and cancelling any authorized but unissued shares.
Transfer of Ordinary Shares
Subject to the restrictions contained in our articles, any of our shareholders may transfer all or any of his or her ordinary shares by an instrument of transfer in any usual or common form or any other form approved by our board of directors, executed by or on behalf of the transferor (and, if in respect of a nil or partly paid-up share, or if so required by our directors, by or on behalf of the transferee).
Our board of directors may, in its absolute discretion, decline to register any transfer of any ordinary share that has not been fully paid up or is subject to a company lien. Our board of directors may also decline to register any transfer of any ordinary share unless:
•the instrument of transfer is lodged with us, accompanied by the certificate (if any) for the ordinary shares to which it relates and such other evidence as our board of directors may reasonably require to show the right of the transferor to make the transfer; 
•the instrument of transfer is in respect of only one class of shares; 
•the instrument of transfer is properly stamped, if required; 
•the ordinary share transferred is fully paid and free of any lien in favor of us; 
•any fee related to the transfer has been paid to us; and 
•the transfer is not to more than four joint holders.
If our directors refuse to register a transfer, they are required, within three months after the date on which the instrument of transfer was lodged, to send to each of the transferor and the transferee notice of such refusal.
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Liquidation
On a winding up of our company, if the assets available for distribution among the holders of our ordinary shares shall be more than sufficient to repay the whole of the share capital at the commencement of the winding up, the surplus will be distributed among the holders of our ordinary shares on a pro rata basis in proportion to the par value of the ordinary shares held by them. If our assets available for distribution are insufficient to repay all of the paid-up capital, the assets will be distributed so that the losses are borne by the holders of our ordinary shares in proportion to the par value of the ordinary shares held by them.
The liquidator may, with the sanction of a special resolution of our shareholders and any other sanction required by the Cayman Companies Act, divide amongst the shareholders in specie or in kind the whole or any part of the assets of our company, and may for that purpose value any assets and determine how the division shall be carried out as between our shareholders or different classes of shareholders.
Because we are a "limited liability" company registered under the Cayman Companies Act, the liability of our shareholders is limited to the amount, if any, unpaid on the shares respectively held by them. Our articles contain a declaration that the liability of our shareholders is so limited.
Calls on Ordinary Shares and Forfeiture of Ordinary Shares
Our board of directors may from time to time make calls upon shareholders for any amounts unpaid on their ordinary shares. The ordinary shares that have been called upon and remain unpaid are subject to forfeiture by the company. In addition, the holders of partly paid ordinary shares will have no right pursuant to the Cayman Companies Act to dividends nor will they be able to redeem their shares.
Redemption, Repurchase and Surrender of Ordinary Shares
We may issue shares on terms that such shares are subject to redemption, at our option or at the option of the holders thereof, on such terms and in such manner as may be determined by our board of directors. We may also repurchase any of our shares provided that the manner and terms of such purchase have been approved by our board of directors or by ordinary resolution of our shareholders (but no repurchase may be made contrary to the terms or manner recommended by our directors), or as otherwise authorized by our articles. Under the Cayman Companies Act, the redemption or repurchase of any share may be paid out of our company's profits or out of the proceeds of a new issue of shares made for the purpose of such redemption or repurchase, or out of capital (including share premium account and capital redemption reserve) if our company can, immediately following such payment, pay its debts as they fall due in the ordinary course of business. In addition, under the Cayman Companies Act no such share may be redeemed or repurchased (1) unless it is fully paid up, (2) if such redemption or repurchase would result in there being no shares outstanding or (3) if the company has commenced liquidation. In addition, our company may accept the surrender of any fully paid share for no consideration.
Variations of Rights of Shares
If at any time our share capital is divided into different classes of shares, all or any of the rights attached to any class of shares may be varied with the consent in writing of the holders of two-thirds of the issued shares of that class or with the sanction of a special resolution passed at a general meeting of the holders of the shares of that class. The rights conferred upon the holders of the shares of any class issued with preferred or other rights will not, unless otherwise expressly provided by the terms of issue of the shares of that class, be deemed to be varied by the creation or issue of further shares ranking pari passu with such existing class of shares.
Notwithstanding the foregoing, our board of directors may issue preferred shares, without further action by the shareholders. See “— Differences in Corporate Law—Directors' Power to Issue Shares”.
General Meetings of Shareholders
Shareholders' meetings may be convened by a majority of our board of directors or our Chairman. As a Cayman Islands exempted company, we are not obligated by the Cayman Companies Act to call shareholders' annual general meetings; 
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however, our corporate governance guidelines provide that we will hold an annual general meeting of shareholders every year to the extent required by the applicable listing rules. The annual general meeting shall be held at such time and place as may be determined by our board of directors.
The Cayman Companies Act provides shareholders with only limited rights to requisition a general meeting, and does not provide shareholders with any right to put any proposal before a general meeting. However, these rights may be provided in a company's articles of association. Our articles provide that upon the requisition of shareholders representing not less than one-tenth of the voting rights entitled to vote at general meetings, our board will convene an extraordinary general meeting and put the resolutions so requisitioned to a vote at such meeting. However, shareholders may propose only ordinary resolutions to be put to a vote at such meeting. Our articles provide no other right for our shareholders to put any proposals before annual general meetings or extraordinary general meetings.
Advance notice of at least 21 calendar days is required for the convening of any annual general meeting of our shareholders and advance notice of at least 14 calendar days is required for the convening of any other general meeting of our shareholders (including any extraordinary general meeting). All general meetings of shareholders shall occur at such time and place as determined by our directors and set forth in the notice for such meeting.
The quorum required for a general meeting of shareholders at which an ordinary resolution has been proposed consists of such shareholders present in person or by proxy who together hold shares which carry the right to at least a simple majority of all votes capable of being exercised on a poll. The quorum required for a general meeting at which a special resolution has been proposed consists of such shareholders present in person or by proxy who together hold shares which carry the right to at least two-thirds of all votes capable of being exercised on a poll.
Nomination, Election and Removal of Directors
 Our articles provide that persons standing for election as directors at a duly constituted general meeting with requisite quorum shall be elected by an ordinary resolution of our shareholders, which requires the affirmative vote of a simple majority of the votes cast on the resolution by the shareholders entitled to vote who are present in person or by proxy at the meeting. Our articles further provide that our board of directors will be divided into three groups designated as Class I, Class II and Class III with as nearly equal a number of directors in each group as possible, with each director serving a three-year term and until his or her successor is duly elected and qualified, subject to his or her earlier resignation or removal.
Upon the expiration of the term of each class, each director in that class, if nominated by the board of directors, shall be eligible for re-election at the annual general meeting to hold office for another three-year term and until such director's successor has been duly elected. Our articles provide that, unless otherwise determined by shareholders in a general meeting, our board of directors will consist of not less than three directors. We have no provisions relating to retirement of directors upon reaching any age limit.
In the event of a vacancy arising from the resignation of a director or as an addition to the existing board of directors, our board may, by the affirmative vote of a simple majority of the remaining directors present and voting at a board meeting, appoint any person to be a director, unless the board resolves to follow any available exceptions or exemptions.
For so long as our ordinary shares or ADSs are listed on the NASDAQ and/or the HKEx, our directors are required to comply with the director nomination procedures required under the NASDAQ Stock Market rules and the HK Listing Rules, and our board of directors is required to include at least such number of independent directors as required by the NASDAQ Stock Market rules and the HK Listing Rules.
Our board shall have a chairman who has been elected and appointed by a majority of the directors then in office. The period for which our chairman holds office shall also be determined by a majority of all of our directors then in office. Our chairman shall preside as chairman at every meeting of our board. To the extent that our chairman is not present at a meeting of our board within 15 minutes after the time appointed for holding the same, the remaining attending directors may choose one of their number to be the chairman of that meeting.
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Our directors shall be elected by an ordinary resolution of the holders of ordinary shares at each annual general meeting of the company to fill the seats of those directors whose terms expire at such annual general meeting.
Each of our directors shall hold office until his or her successor is duly elected or appointed or his or her earlier resignation or removal, notwithstanding any agreement between the company and the director. Our directors may be removed at any time by an affirmative vote of a simple majority of the issued shares as of the applicable record date, with or without cause.
Our board of directors may, from time to time, and except as required by applicable law or applicable listing rules, adopt, institute, amend, modify or revoke any of our corporate governance policies or initiatives of the company, which shall be intended to set forth the guiding principles and policies of the company and our board on various corporate governance related matters as the board shall determine by resolution from time to time.
Proceedings of Board of Directors
Our articles provide that our business is to be managed and conducted by our board of directors. The quorum necessary for a board meeting may be fixed by the board and, unless so fixed at another number, will be a majority of the directors.
Our articles provide that the board may from time to time at its discretion exercise all powers of our company to raise capital or borrow money, to mortgage or charge all or any part of the undertaking, property and assets (present and future) and uncalled capital of our company and, subject to the Cayman Companies Act, issue debentures, bonds and other securities of our company, whether outright or as collateral security for any debt, liability or obligation of our company or of any third party.
Inspection of Books and Records
Holders of our ordinary shares will have no general right under Cayman Companies Act to inspect or obtain copies of our list of shareholders or our corporate records provided that they are entitled to a copy of our articles.
Changes in Capital
Our shareholders may from time to time by ordinary resolution:
•increase the share capital by such sum, to be divided into shares of such classes and amount, as the resolution shall prescribe; 
•consolidate and divide all or any of our share capital into shares of a larger amount than our existing shares; 
•sub-divide our existing shares, or any of them into shares of a smaller amount, provided that in the subdivision the proportion between the amount paid and the amount, if any, unpaid on each reduced share shall be the same as it was in case of the share from which the reduced share is derived; or 
•cancel any shares which, at the date of the passing of the resolution, have not been taken or agreed to be taken by any person and diminish the amount of our share capital by the amount of the shares so cancelled.
Our shareholders may by special resolution, subject to any confirmation or consent required by the Cayman Companies Act, reduce our share capital or any capital redemption reserve in any manner permitted by law.
Restrictive Provisions
Under our articles, in connection with any change of control, merger or sale of our company, the holders of our ordinary shares shall receive the same consideration with respect to their ordinary shares in connection with any such transaction.
Claims Against the Company
Our articles provide that, unless otherwise determined by a simple majority of our board of directors in its sole discretion, consistent with the directors' fiduciary duties to act in the best interests of the company, in the event that (1) any shareholder (the claiming party) initiates or asserts any claim or counterclaim or joins, offers substantial assistance to or has a direct financial interest in any claim against our company and (2) the claiming party (or the third party that received substantial 
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assistance from the claiming party or in whose claim the claiming party had a direct financial interest) does not obtain a judgment on the merits in which the claiming party prevails, then each claiming party shall, to the fullest extent permissible by law, be obligated jointly and severally to reimburse us for all fees, costs and expenses (including, but not limited to, all reasonable attorneys' fees and other litigation expenses) that we may incur in connection with such claim.
Exclusive Forum
Our articles provide that, subject to limited exceptions, the courts of Cayman Islands will be the sole and exclusive forum for (1) any derivative action or proceeding brought on our behalf, (2) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers or other employees to us or our shareholders, (3) any action asserting a claim against us arising pursuant to any provision of the Cayman Companies Act or our articles, or (4) any other action asserting a claim against us that is governed by the internal affairs doctrine (as such concept is recognized under the laws of the United States). Any person or entity purchasing or otherwise acquiring any interest in our share capital shall be deemed to have notice of and to have consented to the provisions of our articles described above. Although we believe these provisions benefit us by providing increased consistency in the application of Cayman Islands law for the specified types of actions and proceedings, the provisions may have the effect of discouraging lawsuits against our directors and officers. It is possible that, in connection with one or more actions or proceedings described above, a court could find the choice of forum provisions contained in our articles to be inapplicable or unenforceable.
Our articles also provide that, unless our company consents in writing to the selection of an alternative forum, the federal district courts of the United States shall be the sole and exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act.  Any person or entity purchasing or otherwise acquiring any share, ADS or other types of securities of our company shall be deemed to have notice of and consented to the provisions of our articles described above.
In connection with our initial public offering of the RMB Shares on the STAR Market (the “STAR Offering”) and the listing of the RMB Shares on the STAR Market, we and each of our directors and executive officers have signed letters of undertaking to (i) confirm and acknowledge that any legal suits, actions or proceedings against us and/or our directors and officers arising from the STAR Offering and the listing of the RMB Shares on the STAR Market during the period when our RMB Shares are listed on the STAR Market (collectively, the “RMB Share Disputes”) shall be governed by the laws of China and subject to the jurisdiction of competent courts in China if such RMB Share Disputes are instituted in competent courts in China, and (ii) undertake that we and our directors and officers waive any objections that we may have to the jurisdiction of such courts over the RMB Share Disputes or the application of Chinese laws by such courts to the RMB Share Disputes.
Exempted Company
We are an exempted company with limited liability incorporated under the Cayman Companies Act. The Cayman Companies Act distinguishes between ordinary resident companies and exempted companies. Any company that is registered in the Cayman Islands but conducts business mainly outside of the Cayman Islands may apply to be registered as an exempted company. The requirements for an exempted company are essentially the same as for an ordinary company except for the exemptions and privileges listed below:
•an exempted company does not have to file an annual return of its shareholders with the Registrar of Companies; 
•an exempted company's register of members is not open to inspection; 
•an exempted company does not have to hold an annual general meeting; 
•an exempted company may issue no par value, negotiable or bearer shares; 
•an exempted company may obtain an undertaking against the imposition of any future taxation (such undertakings are usually given for 20 years in the first instance); 
•an exempted company may register by way of continuation in another jurisdiction and be deregistered in the Cayman Islands; 
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•an exempted company may register as a limited duration company; and 
•an exempted company may register as a segregated portfolio company.
"Limited liability" means that the liability of each shareholder is limited to the amount unpaid by the shareholder on the shares of the company.
We are subject to reporting and other informational requirements of the Exchange Act, as applicable to U.S. domestic issuers. The applicable listing rules require that every company listed on the applicable stock exchange hold an annual general meeting of shareholders. In addition, our articles allow directors to call an extraordinary general meeting of shareholders pursuant to the procedures set forth in our articles. 
Register of Members
Under the Cayman Companies Act, we must keep a register of members and there should be entered therein:
•the names and addresses of our members and a statement of the shares held by each member that distinguishes each share by its number (if applicable), confirms the amount paid or agreed to be considered as paid on the shares of each member, confirms the number and category of shares held by each member and confirms whether each relevant category of shares held by a member carries voting rights under the articles and, if so, whether such voting rights are conditional
•the date on which the name of any person was entered on the register as a member; and 
•the date on which any person ceased to be a member.
Under Cayman Companies Act, the register of members of our company is prima facie evidence of the matters set out in the register (that is, the register of members will raise a presumption of fact on the matters referred to above unless rebutted) and a member registered in the register of members is deemed as a matter of Cayman Companies Act to have legal title to the shares as set against its name in the register of members. Once our register of members has been updated, the shareholders recorded in the register of members will be deemed to have legal title to the shares set against their names.
If the name of any person is incorrectly entered in or omitted from our register of members, or if there is any default or unnecessary delay in entering on the register the fact of any person having ceased to be a member of our company, the person or member aggrieved (or any member of our company or our company itself) may apply to the Grand Court of the Cayman Islands for an order that the register be rectified, and the Court may either refuse such application or it may, if satisfied of the justice of the case, make an order for the rectification of the register.
Differences in Corporate Law
The Cayman Companies Act is derived, to a large extent, from the older Companies Acts of England and Wales but does not follow recent United Kingdom statutory enactments, and accordingly there are significant differences between the Cayman Companies Act and the current Companies Act of England. In addition, the Cayman Companies Act differs from laws applicable to United States corporations and their shareholders. Set forth below is a summary of certain significant differences between the provisions of the Cayman Companies Act applicable to us and the comparable laws applicable to companies incorporated in the State of Delaware in the United States.
Mergers and Similar Arrangements
The Cayman Companies Act permits mergers and consolidations between Cayman Islands companies and between Cayman Islands companies and non-Cayman Islands companies. For these purposes, (1) "merger" means the merging of two or more constituent companies and the vesting of their undertaking, property and liabilities in one of such companies as the surviving company, and (2) a "consolidation" means the combination of two or more constituent companies into a consolidated company and the vesting of the undertaking, property and liabilities of such companies to the consolidated company. In order to effect such a merger or consolidation, the directors of each constituent company must approve a written plan of merger or 
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consolidation, which must then be authorized by (1) a special resolution of the shareholders of each constituent company, and (2) such other authorization, if any, as may be specified in such constituent company's articles of association.
The plan must be filed with the Registrar of Companies together with a declaration as to the solvency of the consolidated or surviving company, a list of the assets and liabilities of each constituent company and an undertaking that a copy of the certificate of merger or consolidation will be given to the members and creditors of each constituent company and that notification of the merger or consolidation will be published in the Cayman Islands Gazette. Court approval is not required for a merger or consolidation effected in compliance with these statutory procedures.
A merger between a Cayman parent company and its Cayman subsidiary or subsidiaries does not require authorization by a resolution of shareholders. For this purpose a subsidiary is a company of which at least 90% of the issued shares entitled to vote are owned by the parent company.
The consent of each holder of a fixed or floating security interest of a constituent company is required unless this requirement is waived by a court in the Cayman Islands.
Except in certain limited circumstances, a dissenting shareholder of a Cayman Islands constituent company is entitled to payment of the fair value of his or her shares upon dissenting from a merger or consolidation. The exercise of such dissenter rights will preclude the exercise by the dissenting shareholder of any other rights to which he or she might otherwise be entitled by virtue of holding shares, except for the right to seek relief on the grounds that the merger or consolidation is void or unlawful.
In addition, there are statutory provisions that facilitate the reconstruction and amalgamation of companies, provided that the arrangement is approved by a majority in number of each class of shareholders and creditors with whom the arrangement is to be made, and who must, in addition, represent three-fourths in value of each such class of shareholders or creditors, as the case may be, that are present and voting either in person or by proxy at a meeting, or meetings, convened for that purpose. The convening of the meetings and subsequently the arrangement must be sanctioned by the Grand Court of the Cayman Islands. While a dissenting shareholder has the right to express to the court the view that the transaction ought not to be approved, the court can be expected to approve the arrangement if it determines that:
•the statutory provisions as to the required majority vote have been met; 
•the shareholders have been fairly represented at the meeting in question and the statutory majority are acting bona fide without coercion of the minority to promote interests adverse to those of the class; 
•the arrangement is such that may be reasonably approved by an intelligent and honest man of that class acting in respect of his interest; and 
•the arrangement is not one that would more properly be sanctioned under some other provision of the Cayman Companies Act.
When a takeover offer is made and accepted by holders of 90% of the shares affected within four months the offeror may, within a two-month period commencing on the expiration of such four-month period, require the holders of the remaining shares to transfer such shares on the terms of the offer. An objection can be made to the Grand Court of the Cayman Islands but this is unlikely to succeed in the case of an offer which has been so approved unless there is evidence of fraud, bad faith or collusion.
If an arrangement and reconstruction is thus approved, or if a takeover offer is made and accepted, a dissenting shareholder would have no rights comparable to appraisal rights, which would otherwise ordinarily be available to dissenting shareholders of Delaware corporations, providing rights to receive payment in cash for the judicially determined value of the shares.
Shareholders' Suits
In principle, we will normally be the proper plaintiff to sue for a wrong done to us as a company, and as a general rule, a derivative action may not be brought by a minority shareholder. However, based on English law authorities, which would in all 
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likelihood be of persuasive authority in the Cayman Islands, the Cayman Islands courts can be expected to follow and apply the common law principles (namely the rule in Foss v. Harbottle and the exceptions thereto) so that a non-controlling shareholder may be permitted to commence a class action against or derivative actions in the name of the company to challenge:
•an act that is illegal or ultra vires with respect to the company and is therefore incapable of ratification by the shareholders; 
•an act that, although not ultra vires, requires authorization by a qualified (or special) majority (that is, more than a simple majority) that has not been obtained; and 
•an act that constitutes a "fraud on the minority" where the wrongdoers are themselves in control of the company.
Indemnification of Directors and Executive Officers and Limitation of Liability
The Cayman Companies Act does not limit the extent to which a company's articles of association may provide for indemnification of officers and directors, except to the extent any such provision may be held by the Cayman Islands courts to be contrary to public policy, such as to provide indemnification against civil fraud or the consequences of committing a crime. Our articles provide that we shall indemnify our officers and directors against all actions, proceedings, costs, charges, expenses, losses, damages or liabilities incurred or sustained by such directors or officer, other than by reason of such person's dishonesty, willful default or fraud, in or about the conduct of our company's business or affairs (including as a result of any mistake of judgment) or in the execution or discharge of his duties, powers, authorities or discretions, including without prejudice to the generality of the foregoing, any costs, expenses, losses or liabilities incurred by such director or officer in defending (whether successfully or otherwise) any civil proceedings concerning our company or its affairs in any court whether in the Cayman Islands or elsewhere. This standard of conduct is generally the same as permitted under the Delaware General Corporation Law for a Delaware corporation. In addition, we intend to enter into indemnification agreements with our directors and executive officers that will provide such persons with additional indemnification beyond that provided in our articles.
Insofar as indemnification for liabilities arising under the Securities Act may be permitted to our directors, officers or persons controlling us under the foregoing provisions, we have been informed that, in the opinion of the SEC, such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.
Anti-Takeover Provisions in Our Articles
Some provisions of our articles may discourage, delay or prevent a change in control of our company or management that shareholders may consider favorable, including limitations on shareholder rights to nominate or remove directors, as well as provisions that authorize our board of directors to issue preferred shares in one or more series and to designate the price, rights, preferences, privileges and restrictions of such preferred shares without any further vote or action by our shareholders.
Under the Cayman Companies Act, our directors may only exercise the rights and powers granted to them under our articles, as amended and restated from time to time, for what they believe in good faith to be in the best interests of our company and for a proper purpose.
Directors' Fiduciary Duties
Under Delaware corporate law, a director of a Delaware corporation has a fiduciary duty to the corporation and its shareholders. This duty has two components: the duty of care and the duty of loyalty. The duty of care requires that a director act in good faith, with the care that an ordinarily prudent person would exercise under similar circumstances. Under this duty, a director must inform himself of, and disclose to shareholders, all material information reasonably available regarding a significant transaction. The duty of loyalty requires that a director act in a manner he or she reasonably believes to be in the best interests of the corporation. He or she must not use his or her corporate position for personal gain or advantage. This duty prohibits self-dealing by a director and mandates that the best interests of the corporation and its shareholders take precedence over any interest possessed by a director, officer or controlling shareholder and not shared by the shareholders generally. In general, actions of a director are presumed to have been made on an informed basis, in good faith and in the honest belief that the action taken was in the best interests of the corporation. However, this presumption may be rebutted by evidence of a breach 
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of one of the fiduciary duties. Should such evidence be presented concerning a transaction by a director, a director must prove the transaction was procedurally fair and provided fair value to the corporation.
As a matter of Cayman law, a director of a Cayman Islands company is in the position of a fiduciary with respect to the company and therefore owes the following duties to the company—a duty to act bona fide in the best interests of the company, a duty not to make a profit based on his or her position as director (unless the company permits him or her to do so), a duty not to put himself or herself in a position where the interests of the company conflict with his or her personal interest or his or her duty to a third party, and a duty to exercise powers for the purpose for which such powers were intended. A director of a Cayman Islands company owes to the company a duty to act with skill and care. It was previously considered that a director need not exhibit in the performance of his or her duties a greater degree of skill than may reasonably be expected from a person of his or her knowledge and experience. However, English and Commonwealth courts have moved towards an objective standard with regard to the required skill and care, and these authorities are likely to be followed in the Cayman Islands.
Shareholder Proposals
Under the Delaware General Corporation Law, a shareholder has the right to put any proposal before the annual meeting of shareholders, provided it complies with the notice provisions in the governing documents. The Delaware General Corporation Law does not provide shareholders an express right to put any proposal before the annual meeting of shareholders, but in keeping with common law, Delaware corporations generally afford shareholders an opportunity to make proposals and nominations provided that they comply with the notice provisions in the certificate of incorporation or bylaws. A special meeting may be called by the board of directors or any other person authorized to do so in the governing documents, but shareholders may be precluded from calling special meetings.
The Cayman Companies Act provides shareholders with only limited rights to requisition a general meeting, and does not provide shareholders with any right to put any proposal before a general meeting. However, these rights may be provided in a company's articles of association. Our articles allow our shareholders holding not less than one-tenth of the voting rights entitled to vote at general meetings to requisition an extraordinary general meeting of our shareholders, in which case our board is obliged to convene an extraordinary general meeting and to put the resolutions so requisitioned to a vote at such meeting. However, our shareholders may propose only ordinary resolutions to be put to a vote at such meetings. Our articles provide no other right to put any proposals before annual general meetings or extraordinary general meetings. As a Cayman Islands exempted company, we are not obligated by law to call shareholders' annual general meetings.
However, our corporate governance guidelines require us to call such meetings every year to the extent required by the applicable listing rules.
Cumulative Voting
Under the Delaware General Corporation Law, cumulative voting for elections of directors is not permitted unless the corporation's certificate of incorporation specifically provides for it. Cumulative voting potentially facilitates the representation of minority shareholders on a board of directors since it permits the minority shareholder to cast all the votes to which the shareholder is entitled on a single director, which increases the shareholder's voting power with respect to electing such director. As permitted under the Cayman Companies Act, our articles do not provide for cumulative voting. As a result, our shareholders are not afforded any less protections or rights on this issue than shareholders of a Delaware corporation.
Removal of Directors
Under the Delaware General Corporation Law, a director of a corporation with a classified board may be removed only for cause with the approval of a majority of the outstanding shares entitled to vote, unless the certificate of incorporation provides otherwise. Under our articles, any director may be removed by an affirmative vote of a simple majority of the issued shares as of the applicable record date, with or without cause.
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Transactions with Interested Shareholders
The Delaware General Corporation Law contains a business combination statute applicable to Delaware public corporations whereby, unless the corporation has specifically elected not to be governed by such statute by amendment to its certificate of incorporation or bylaws that is approved by its shareholders, it is prohibited from engaging in certain business combinations with an "interested shareholder" for three years following the date that such person becomes an interested shareholder. An interested shareholder generally is a person or a group who or which owns or owned 15% or more of the target's outstanding voting stock or who or which is an affiliate or associate of the corporation and owned 15% or more of the corporation's outstanding voting stock within the past three years. This has the effect of limiting the ability of a potential acquirer to make a two-tiered bid for the target in which all shareholders would not be treated equally. The statute does not apply if, among other things, prior to the date on which such shareholder becomes an interested shareholder, the board of directors approves either the business combination or the transaction which resulted in the person becoming an interested shareholder. This encourages any potential acquirer of a Delaware corporation to negotiate the terms of any acquisition transaction with the target's board of directors.
The Cayman Companies Act has no comparable statute. As a result, we cannot avail ourselves of the types of protections afforded by the Delaware business combination statute. However, although the Cayman Companies Act does not regulate transactions between a company and its significant shareholders, it does provide that such transactions must be entered into bona fide in the best interests of the company and for a proper corporate purpose and not with the effect of constituting a fraud on the minority shareholders.
Dissolution; Winding Up
Under the Delaware General Corporation Law, unless the board of directors approves the proposal to dissolve, dissolution must be approved by shareholders holding 100% of the total voting power of the corporation. Only if the dissolution is initiated by the board of directors may it be approved by a simple majority of the corporation's outstanding shares. Delaware law allows a Delaware corporation to include in its certificate of incorporation a supermajority voting requirement in connection with dissolutions initiated by the board of directors.
Under the Cayman Companies Act and our articles, our company may be wound up only upon resolution of shareholders holding 100% of the total voting rights entitled to vote or if the winding up is initiated by our board of directors, by either a special resolution of our members or, if our company is unable to pay its debts as they fall due, by an ordinary resolution of our members. In addition, a company may be wound up by an order of the courts of the Cayman Islands. The court has authority to order winding up in a number of specified circumstances including where it is, in the opinion of the court, just and equitable to do so.
Variation of Rights of Shares
Under the Delaware General Corporation Law, a corporation may vary the rights of a class of shares with the approval of a majority of the outstanding shares of such class, unless the certificate of incorporation provides otherwise. Under the Cayman Companies Act and our articles, if our share capital is divided into more than one class of shares, we may materially and adversely vary the rights attached to any class only with the consent in writing of the holders of two-thirds of the shares of that class or with the sanction of a special resolution passed at a general meeting of the holders of the shares of that class.
Amendment of Governing Documents
Under the Delaware General Corporation Law, a corporation's certificate of incorporation may be amended only if adopted and declared advisable by the board of directors and approved by a majority of the outstanding shares entitled to vote, and the bylaws may be amended with the approval of a majority of the outstanding shares entitled to vote and may, if so provided in the certificate of incorporation, also be amended by the board of directors. Under the Cayman Companies Act and our articles, our articles may only be amended by special resolution of our shareholders.
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Rights of Non-Resident or Foreign Shareholders
There are no limitations imposed by our articles on the rights of non-resident or foreign shareholders to hold or exercise voting rights on our shares. In addition, there are no provisions in our articles governing the ownership threshold above which shareholder ownership must be disclosed.
Directors' Power to Issue Shares
Under our articles, our board of directors is empowered to issue or allot shares or grant options, restricted shares, restricted share units, share appreciation rights, dividend equivalent rights, warrants and analogous equity-based rights with or without preferred, deferred, qualified or other special rights or restrictions. In particular, pursuant to our articles, our board of directors has the authority, without further action by the shareholders, to issue all or any part of our capital and to fix the designations, powers, preferences, privileges, and relative participating, optional or special rights and the qualifications, limitations or restrictions therefrom, including dividend rights, conversion rights, voting rights, terms of redemption and liquidation preferences, any or all of which may be greater than the rights of our ordinary shares. Our board of directors, without shareholder approval, may issue preferred shares with voting, conversion or other rights that could adversely affect the voting power and other rights of holders of our ordinary shares. Subject to the directors' duty of acting in the best interest of our company, preferred shares can be issued quickly with terms calculated to delay or prevent a change in control of us or make removal of management more difficult. Additionally, the issuance of preferred shares may have the effect of decreasing the market price of the ordinary shares, and may adversely affect the voting and other rights of the holders of ordinary shares.
Inspection of Books and Records
Holders of our ordinary shares will have no general right under the Cayman Companies Act to inspect or obtain copies of our list of shareholders or our corporate records. However, we will provide our shareholders with annual audited financial statements. 
Registration Rights
On November 16, 2016, we entered into a registration rights agreement with 667, L.P., Baker Brothers Life Sciences, L.P. and 14159, L.P. ("the Baker Entities"), Hillhouse BGN Holdings Limited, Gaoling Fund, L.P. and YHG Investment, L.P. ("the Hillhouse Entities"), (each an "Investor" and collectively, the "Investors"), all of which were existing shareholders. The registration rights agreement provides that, subject to certain limitations, if at any time and from time to time, the Investors demand that we register our ordinary shares and any other securities held by the Investors at the time any such demand is made on a Registration Statement on Form S-3 for resale under the Securities Act, we would be obligated to effect such registration. Our registration obligations under the registration rights agreement will continue in effect for up to four years, and include our obligation to facilitate certain underwritten public offerings of our ordinary shares or ADSs by the Investors in the future. The registration rights agreement also requires us to pay expenses relating to such registrations and indemnify the Investors against certain liabilities. On December 1, 2020, we and the Investors entered into an Amendment No.1 to the Registration Rights Agreement, effective December 31, 2020, pursuant to which our registration obligations under the Registration Rights Agreement will continue in effect for up to another three years, until December 31, 2023.
Pursuant to the Share Purchase Agreement (the "Share Purchase Agreement") dated October 31, 2019, as amended, by and between us and Amgen Inc. ("Amgen"), Amgen will have specified registration rights upon expiration of a lock-up period. Following demand by Amgen at any time after the expiration of the lock-up period or such earlier time as we in our sole discretion may agree in writing, we shall, subject to certain limits as specified under the Share Purchase Agreement, file with the SEC a Registration Statement on Form S-3 (except if we are not then eligible to register for resale the registrable shares on Form S-3, in which case such registration shall be on another appropriate form in accordance with the Securities Act) covering the resale of the registrable shares of Amgen. In addition, where we propose to register any of our ordinary shares or ADSs under the Securities Act for sale to the public (other than a registration effected solely to implement an employee benefit plan or a transaction to which Rule 145 of the Securities Act is applicable, or a registration statement in a form not available for registering registrable shares for sale to the public), we will give notice to Amgen of our intention to do so and, upon the 
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request of Amgen, use our reasonable best efforts to cause all the registrable shares of Amgen to be registered under the Securities Act in connection therewith, under specified circumstances and as set forth in the Share Purchase Agreement.
Description of American Depositary Shares
Citibank, N.A. (“Citibank”) acts as the depositary bank for the ADSs. Citibank's depositary offices are located at 388 Greenwich Street, New York, New York 10013. American Depositary Shares are frequently referred to as "ADSs" and represent ownership interests in securities that are on deposit with the depositary bank. ADSs may be represented by certificates that are commonly known as "American Depositary Receipts" or "ADRs." The depositary bank typically appoints a custodian to safekeep the securities on deposit. In this case, the custodian is Citibank, N.A. - Hong Kong, presently located at 9/F, Citi Tower, One Bay East, 83 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong.
We have appointed Citibank as depositary bank pursuant to a deposit agreement. A copy of the deposit agreement, as amended, is on file with the SEC under cover of a Registration Statement on Form F-6. You may obtain a copy of the deposit agreement from the SEC's Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549 and from the SEC's website (www.sec.gov). Please refer to Registration Number 333-209044 when retrieving such copy.
We are providing you with a summary description of the material terms of the ADSs and of your material rights as an owner of ADSs. Please remember that summaries by their nature lack the precision of the information summarized and that the rights and obligations of an owner of ADSs will be determined by reference to the terms of the deposit agreement and not by this summary. We urge you to review the deposit agreement in its entirety. The portions of this summary description that are italicized describe matters that may be relevant to the ownership of ADSs but that may not be contained in the deposit agreement.
Each ADS represents the right to receive, and to exercise the beneficial ownership interests in, 13 ordinary shares that are on deposit with the depositary bank and/or custodian. An ADS also represents the right to receive, and to exercise the beneficial interests in, any other property received by the depositary bank or the custodian on behalf of the owner of the ADS but that has not been distributed to the owners of ADSs because of legal restrictions or practical considerations. We and the depositary bank may agree to change the ADS-to-ordinary share ratio by amending the deposit agreement. This amendment may give rise to, or change, the depositary fees payable by ADS owners. The custodian, the depositary bank and their respective nominees will hold all deposited property for the benefit of the holders and beneficial owners of ADSs. The deposited property does not constitute the proprietary assets of the depositary bank, the custodian or their nominees. Beneficial ownership in the deposited property will under the terms of the deposit agreement be vested in the beneficial owners of the ADSs. The depositary bank, the custodian and their respective nominees will be the record holders of the deposited property represented by the ADSs for the benefit of the holders and beneficial owners of the corresponding ADSs. A beneficial owner of ADSs may or may not be the holder of ADSs. Beneficial owners of ADSs will be able to receive, and to exercise beneficial ownership interests in, the deposited property only through the registered holders of the ADSs, the registered holders of the ADSs (on behalf of the applicable ADS owners) only through the depositary bank, and the depositary bank (on behalf of the owners of the corresponding ADSs) directly, or indirectly, through the custodian or their respective nominees, in each case upon the terms of the deposit agreement.
If you become an owner of ADSs, you will become a party to the deposit agreement and therefore will be bound to its terms and to the terms of any ADR that represents your ADSs. The deposit agreement and the ADR specify our rights and obligations as well as your rights and obligations as an owner of ADSs and those of the depositary bank. As an ADS holder you appoint the depositary bank to act on your behalf in certain circumstances. The deposit agreement and the ADRs are governed by New York law. However, our obligations to the holders of the ordinary shares will continue to be governed by the laws of the Cayman Islands, which may be different from the laws in the United States.
In addition, applicable laws and regulations may require you to satisfy reporting requirements and obtain regulatory approvals in certain circumstances. You are solely responsible for complying with such reporting requirements and obtaining such approvals. Neither the depositary bank, the custodian, us or any of their or our respective agents or affiliates shall be required to take any actions whatsoever on your behalf to satisfy such reporting requirements or obtain such regulatory approvals under applicable laws and regulations.
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The manner in which you own the ADSs (e.g., in a brokerage account vs. as registered holder, or as holder of certificated vs. uncertificated ADSs) may affect your rights and obligations, and the manner in which, and extent to which, the depositary bank's services are made available to you. As an owner of ADSs, we will not treat you as one of our shareholders and you will not have direct shareholder rights. The depositary bank will hold on your behalf the shareholder rights attached to the ordinary shares underlying your ADSs. As an owner of ADSs you will be able to exercise the shareholders rights for the ordinary shares represented by your ADSs through the depositary bank only to the extent contemplated in the deposit agreement. To exercise any shareholder rights not contemplated in the deposit agreement you will, as an ADS owner, need to arrange for the cancellation of your ADSs and become a direct shareholder.
As an owner of ADSs, you may hold your ADSs either by means of an ADR registered in your name, through a brokerage or safekeeping account, or through an account established by the depositary bank in your name reflecting the registration of uncertificated ADSs directly on the books of the depositary bank (commonly referred to as the "direct registration system" or "DRS"). The direct registration system reflects the uncertificated (book-entry) registration of ownership of ADSs by the depositary bank. Under the direct registration system, ownership of ADSs is evidenced by periodic statements issued by the depositary bank to the holders of the ADSs. The direct registration system includes automated transfers between the depositary bank and The Depository Trust Company ("DTC"), the central book-entry clearing and settlement system for equity securities in the United States. If you decide to hold your ADSs through your brokerage or safekeeping account, you must rely on the procedures of your broker or bank to assert your rights as ADS owner. Banks and brokers typically hold securities such as the ADSs through clearing and settlement systems such as DTC. The procedures of such clearing and settlement systems may limit your ability to exercise your rights as an owner of ADSs. Please consult with your broker or bank if you have any questions concerning these limitations and procedures. All ADSs held through DTC will be registered in the name of a nominee of DTC. This summary description assumes you have opted to own the ADSs directly by means of an ADS registered in your name and, as such, we will refer to you as the "holder." When we refer to "you," we assume the reader owns ADSs and will own ADSs at the relevant time.
The registration of the ordinary shares in the name of the depositary bank or the custodian shall, to the maximum extent permitted by applicable law, vest in the depositary bank or the custodian the record ownership in the applicable ordinary shares with the beneficial ownership rights and interests in such ordinary shares being at all times vested with the beneficial owners of the ADSs representing the ordinary shares. The depositary bank or the custodian shall at all times be entitled to exercise the beneficial ownership rights in all deposited property, in each case only on behalf of the holders and beneficial owners of the ADSs representing the deposited property.
Dividends and Distributions
As a holder of ADSs, you generally have the right to receive the distributions we make on the securities deposited with the custodian. Your receipt of these distributions may be limited, however, by practical considerations and legal limitations. Holders of ADSs will receive such distributions under the terms of the deposit agreement in proportion to the number of ADSs held as of the specified record date, after deduction of the applicable fees, taxes and expenses. 
Distributions of Cash
Whenever we make a cash distribution for the securities on deposit with the custodian, we will deposit the funds with the custodian. Upon receipt of confirmation of the deposit of the requisite funds, the depositary bank will arrange for the funds received in a currency other than U.S. dollars to be converted into U.S. dollars and for the distribution of the U.S. dollars to the holders, subject to the applicable laws and regulations.
The conversion into U.S. dollars will take place only if practicable and if the U.S. dollars are transferable to the United States. The depositary bank will apply the same method for distributing the proceeds of the sale of any property (such as undistributed rights) held by the custodian in respect of securities on deposit.
The distribution of cash will be made net of the fees, expenses, taxes and governmental charges payable by holders under the terms of the deposit agreement. The depositary bank will hold any cash amounts it is unable to distribute in a non-interest bearing account for the benefit of the applicable holders and beneficial owners of ADSs until the distribution can be effected or 
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the funds that the depositary bank holds must be escheated as unclaimed property in accordance with the laws of the relevant states of the United States.
Distributions of Shares
Whenever we make a free distribution of the ordinary shares for the securities on deposit with the custodian, we will deposit the applicable number of the ordinary shares with the custodian. Upon receipt of confirmation of such deposit, the depositary bank will either distribute to holders new ADSs representing the ordinary shares deposited or modify the ADS-to-ordinary share ratio, in which case each ADS you hold will represent rights and interests in the additional ordinary shares so deposited. Only whole new ADSs will be distributed. Fractional entitlements will be sold and the proceeds of such sale will be distributed as in the case of a cash distribution.
The distribution of new ADSs or the modification of the ADS-to-ordinary share ratio upon a distribution of the ordinary shares will be made net of the fees, expenses, taxes and governmental charges payable by holders under the terms of the deposit agreement. In order to pay such taxes or governmental charges, the depositary bank may sell all or a portion of the new ordinary shares so distributed.
No such distribution of new ADSs will be made if it would violate a law (e.g., the U.S. securities laws) or if it is not operationally practicable. If the depositary bank does not distribute new ADSs as described above, it may sell the ordinary shares received upon the terms described in the deposit agreement and will distribute the proceeds of the sale as in the case of a distribution of cash.
Distributions of Rights
Whenever we intend to distribute rights to subscribe for additional ordinary shares, we will give prior notice to the depositary bank and we will assist the depositary bank in determining whether it is lawful and reasonably practicable to distribute rights to subscribe for additional ADSs to holders.
The depositary bank will establish procedures to distribute rights to subscribe for additional ADSs to holders and to enable such holders to exercise such rights if it is lawful and reasonably practicable to make the rights available to holders of ADSs, and if we provide all of the documentation contemplated in the deposit agreement (such as opinions to address the lawfulness of the transaction). You may have to pay fees, expenses, taxes and other governmental charges to subscribe for the new ADSs upon the exercise of your rights. The depositary bank is not obligated to establish procedures to facilitate the distribution and exercise by holders of rights to subscribe for new ordinary shares other than in the form of ADSs.
The depositary bank will not distribute the rights to you if:
•We do not timely request that the rights be distributed to you or we request that the rights not be distributed to you; 
•We fail to deliver satisfactory documents to the depositary bank; or 
•It is not reasonably practicable to distribute the rights.
The depositary bank will sell the rights that are not exercised or not distributed if such sale is lawful and reasonably practicable. The proceeds of such sale will be distributed to holders as in the case of a cash distribution. If the depositary bank is unable to sell the rights, it will allow the rights to lapse.
Elective Distributions
Whenever we intend to distribute a dividend payable at the election of shareholders either in cash or in additional shares, we will give prior notice thereof to the depositary bank and will indicate whether we wish the elective distribution to be made available to you. In such case, we will assist the depositary bank in determining whether such distribution is lawful and reasonably practicable.
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The depositary bank will make the election available to you only if it is reasonably practicable and if we have provided all of the documentation contemplated in the deposit agreement. In such case, the depositary bank will establish procedures to enable you to elect to receive either cash or additional ADSs, in each case as described in the deposit agreement.
If the election is not made available to you, you will receive either cash or additional ADSs, depending on what a shareholder in the Cayman Islands would receive upon failing to make an election, as more fully described in the deposit agreement.
Other Distributions
Whenever we intend to distribute property other than cash, ordinary shares or rights to subscribe for additional ordinary shares, we will notify the depositary bank in advance and will indicate whether we wish such distribution to be made to you. If so, we will assist the depositary bank in determining whether such distribution to holders is lawful and reasonably practicable.
If it is reasonably practicable to distribute such property to you and if we provide all of the documentation contemplated in the deposit agreement to the depositary bank, the depositary bank will distribute the property to the holders in a manner it deems practicable.
The distribution will be made net of fees, expenses, taxes and governmental charges payable by holders under the terms of the deposit agreement. In order to pay such taxes and governmental charges, the depositary bank may sell all or a portion of the property received.
The depositary bank will not distribute the property to you and will sell the property if:
•We do not request that the property be distributed to you or if we request that the property not be distributed to you; or
•We do not deliver satisfactory documents to the depositary bank; or 
•The depositary bank determines that all or a portion of the distribution to you is not reasonably practicable.
The proceeds of such a sale will be distributed to holders as in the case of a cash distribution.
Redemption
Whenever we decide to redeem any of the securities on deposit with the custodian, we will notify the depositary bank in advance. If it is practicable and if we provide all of the documentation contemplated in the deposit agreement, the depositary bank will provide notice of the redemption to the holders.
The custodian will be instructed to surrender the shares being redeemed against payment of the applicable redemption price. The depositary bank will convert into U.S. dollars the redemption funds received in a currency other than U.S. dollars upon the terms of the deposit agreement and will establish procedures to enable holders to receive the net proceeds from the redemption upon surrender of their ADSs to the depositary bank. You may have to pay fees, expenses, taxes and other governmental charges upon the redemption of your ADSs. If less than all ADSs are being redeemed, the ADSs to be retired will be selected by lot or on a pro rata basis, as the depositary bank may determine.
Changes Affecting Ordinary Shares
The ordinary shares held on deposit for your ADSs may change from time to time. For example, there may be a change in nominal or par value, split-up, cancellation, consolidation or any other reclassification of such ordinary shares or a recapitalization, reorganization, merger, consolidation or sale of assets of BeiGene.
If any such change were to occur, your ADSs would, to the extent permitted by law and the deposit agreement, represent the right to receive the property received or exchanged in respect of the ordinary shares held on deposit. The depositary bank may in such circumstances deliver new ADSs to you, amend the deposit agreement, the ADRs and the applicable Registration Statement(s) on Form F-6, call for the exchange of your existing ADSs for new ADSs and take any other actions that are appropriate to reflect as to the ADSs the change affecting the ordinary shares. If the depositary bank may not lawfully distribute 
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such property to you, the depositary bank may sell such property and distribute the net proceeds to you as in the case of a cash distribution.
Issuance of ADSs Upon Deposit of Ordinary Shares
The depositary bank may create ADSs on behalf of investors who deposit ordinary shares with the custodian. The depositary bank will deliver these ADSs to the person you indicate only after you pay any applicable issuance fees and any charges and taxes payable for the transfer of the ordinary shares to the custodian. Your ability to deposit ordinary shares and receive ADSs may be limited by U.S. and Cayman Islands legal considerations applicable at the time of deposit.
The issuance of ADSs may be delayed until the depositary bank or the custodian receives confirmation that all required approvals have been given and that the ordinary shares have been duly transferred to the custodian. The depositary bank will only issue ADSs in whole numbers.
When you make a deposit of the ordinary shares, you will be responsible for transferring good and valid title to the depositary bank. As such, you will be deemed to represent and warrant that:
•The ordinary shares are duly authorized, validly issued, fully paid, non-assessable and legally obtained. 
•All preemptive (and similar) rights, if any, with respect to such ordinary shares have been validly waived or exercised. 
•You are duly authorized to deposit the ordinary shares. 
•The ordinary shares presented for deposit are free and clear of any lien, encumbrance, security interest, charge, mortgage or adverse claim, and are not, and the ADSs issuable upon such deposit will not be, "restricted securities" (as defined in the deposit agreement). 
•The ordinary shares presented for deposit have not been stripped of any rights or entitlements.
If any of the representations or warranties are incorrect in any way, we and the depositary bank may, at your cost and expense, take any and all actions necessary to correct the consequences of the misrepresentations.
Transfer, Combination and Split Up of ADRs
As an ADR holder, you will be entitled to transfer, combine or split up your ADRs and the ADSs evidenced thereby. For transfers of ADRs, you will have to surrender the ADRs to be transferred to the depositary bank and also must:
•ensure that the surrendered ADR is properly endorsed or otherwise in proper form for transfer; 
•provide such proof of identity and genuineness of signatures as the depositary bank deems appropriate; 
•provide any transfer stamps required by the State of New York or the United States; and 
•pay all applicable fees, charges, expenses, taxes and other government charges payable by ADR holders pursuant to the terms of the deposit agreement, upon the transfer of ADRs.
To have your ADRs either combined or split up, you must surrender the ADRs in question to the depositary bank with your request to have them combined or split up, and you must pay all applicable fees, charges and expenses payable by ADR holders, pursuant to the terms of the deposit agreement, upon a combination or split up of ADRs.
Withdrawal of Ordinary Shares Upon Cancellation of ADSs
As a holder, you will be entitled to present your ADSs to the depositary bank for cancellation and then receive the corresponding number of underlying ordinary shares at the custodian's offices. Your ability to withdraw the ordinary shares held in respect of the ADSs may be limited by U.S. and Cayman Islands legal considerations applicable at the time of withdrawal. In order to withdraw the ordinary shares represented by your ADSs, you will be required to pay to the depositary bank the fees for cancellation of ADSs and any charges and taxes payable upon the transfer of the ordinary shares. You assume 
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the risk for delivery of all funds and securities upon withdrawal. Once canceled, the ADSs will not have any rights under the deposit agreement.
If you hold ADSs registered in your name, the depositary bank may ask you to provide proof of identity and genuineness of any signature and such other documents as the depositary bank may deem appropriate before it will cancel your ADSs. The withdrawal of the ordinary shares represented by your ADSs may be delayed until the depositary bank receives satisfactory evidence of compliance with all applicable laws and regulations. Please keep in mind that the depositary bank will only accept ADSs for cancellation that represent a whole number of securities on deposit.
You will have the right to withdraw the securities represented by your ADSs at any time except for:
•temporary delays that may arise because (i) the transfer books for the ordinary shares or ADSs are closed, or (ii) the ordinary shares are immobilized on account of a shareholders' meeting or a payment of dividends; 
•obligations to pay fees, taxes and similar charges; or 
•restrictions imposed because of laws or regulations applicable to ADSs or the withdrawal of securities on deposit.
The deposit agreement may not be modified to impair your right to withdraw the securities represented by your ADSs except to comply with mandatory provisions of law.
Voting Rights
As a holder, you generally have the right under the deposit agreement to instruct the depositary bank to exercise the voting rights for the ordinary shares represented by your ADSs. The voting rights of holders of ordinary shares are described in "— Ordinary Shares".
At our request, the depositary bank will distribute to you any notice of shareholders' meeting received from us together with information explaining how to instruct the depositary bank to exercise the voting rights of the securities represented by ADSs. In lieu of distributing such materials, the depositary bank may distribute to holders of ADSs instructions on how to retrieve such materials upon request.
If the depositary bank timely receives voting instructions from a holder of ADSs, it will endeavor to vote the securities (in person or by proxy) represented by the holder's ADSs in accordance with the voting instructions received from the holders of ADSs.
Our articles provide that voting of shareholders at any meeting is by poll. Holders of ADSs in respect of which no timely voting instructions have been received, or timely voting instructions have been received however such instructions fail to specify the manner in which the depositary is to vote, shall be deemed to have instructed the depositary to give a discretionary proxy to a person designated by us to vote the ordinary shares represented by such holders' ADSs; provided, that no such instruction shall be deemed given and no such discretionary proxy shall be given with respect to any matter as to which we inform the depositary that we do not wish such proxy to be given; provided, further, that no such discretionary proxy shall be given with respect to any matter as to which we inform the depositary that (i) there exists substantial opposition, or (ii) the rights of shareholders of our company will be materially adversely affected.
Please note that the ability of the depositary bank to carry out voting instructions may be limited by practical and legal limitations and the terms of the securities on deposit. We cannot assure you that you will receive voting materials in time to enable you to return voting instructions to the depositary bank in a timely manner.


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Fees and Charges
As an ADS holder, you will be required to pay the following fees under the terms of the deposit agreement:
									
	Service
	

	Fees

	•Issuance of ADSs upon deposit of ordinary shares (excluding issuances as a result of distributions of ADSs pursuant to 
(i) stock dividends or other free stock distributions, or (ii) exercise of rights to purchase additional ADSs)
		Up to U.S. $5.00 per 100 ADSs (or fraction thereof) issued
	•Delivery of deposited property against surrender of ADSs
		Up to U.S. $5.00 per 100 ADSs (or fraction thereof) canceled
	•Distribution of cash dividends or other cash distributions (i.e., sale of rights and other entitlements)
		Up to U.S. $5.00 per 100 ADSs (or fraction thereof) held
	•Distribution of ADSs pursuant to (i) stock dividends or other free stock distributions, or (ii) exercise of rights to purchase additional ADSs
		Up to U.S. $5.00 per 100 ADSs (or fraction thereof) held
	•Distribution of securities other than ADSs or rights to purchase additional ADSs (i.e., spin-off shares)
		Up to U.S. $5.00 per 100 ADSs (or fraction thereof) held
	•ADS Services
		Up to U.S. $5.00 per 100 ADSs (or fraction thereof) held on the applicable record date(s) established by the depositary bank


As an ADS holder you will also be responsible to pay certain charges such as:
•taxes (including applicable interest and penalties) and other governmental charges; 
•the registration fees as may from time to time be in effect for the registration of the ordinary shares on the share register and applicable to transfers of the ordinary shares to or from the name of the custodian, the depositary bank or any nominees upon the making of deposits and withdrawals, respectively; 
•such cable, telex and facsimile transmission and delivery expenses as are expressly provided in the deposit agreement to be at the expense of the person depositing ordinary shares or withdrawing deposited securities or of the holders and beneficial owners of ADSs; 
•the expenses and charges incurred by the depositary bank in the conversion of foreign currency; 
•the fees and expenses incurred by the depositary bank in connection with compliance with exchange control regulations and other regulatory requirements applicable to the ordinary shares, deposited securities, ADSs and ADRs; and 
•the fees and expenses incurred by the depositary bank, the custodian or any nominee in connection with the servicing or delivery of deposited property.
ADS fees and charges payable upon (i) deposit of the ordinary shares against issuance of ADSs and (ii) surrender of ADSs for cancellation and withdrawal of the ordinary shares are charged to the person to whom the ADSs are delivered (in the case of ADS issuances) and to the person who delivers the ADSs for cancellation (in the case of ADS cancellations). In the case of ADSs issued by the depositary bank into DTC or presented to the depositary bank via DTC, the ADS issuance and cancellation fees and charges will be payable by the DTC participant(s) receiving the ADSs from the depositary bank or the DTC participant(s) surrendering the ADSs to the depositary bank for cancellation, as the case may be, on behalf of the beneficial 
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owner(s) and will be charged by the DTC participant(s) to the account(s) of the applicable beneficial owner(s) in accordance with the procedures and practices of the DTC participant(s) as in effect at the time. ADS fees and charges in respect of distributions and the ADS service fee are payable by holders as of the applicable ADS record date established by the depositary bank. In the case of distributions of cash, the amount of the applicable ADS fees and charges is deducted from the funds being distributed. In the case of (i) distributions other than cash and (ii) the ADS service fee, holders as of the ADS record date will be invoiced for the amount of the ADS fees and charges and such ADS fees and charges may be deducted from distributions made to holders of ADSs. For ADSs held through DTC, the ADS fees and charges for distributions other than cash and the ADS service fee may be deducted from distributions made through DTC, and may be charged to the DTC participants in accordance with the procedures and practices prescribed by DTC and the DTC participants in turn charge the amount of such ADS fees and charges to the beneficial owners for whom they hold ADSs.
In the event of refusal to pay the depositary bank fees, the depositary bank may, under the terms of the deposit agreement, refuse the requested service until payment is received or may set off the amount of the depositary bank fees from any distribution to be made to the ADS holder. Certain of the depositary fees and charges (such as the ADS services fee) may become payable shortly after the closing of the ADS offering. Note that the fees and charges you may be required to pay may vary over time and may be changed by us and by the depositary bank. You will receive prior notice of such changes. The depositary bank may reimburse us for certain expenses incurred by us in respect of the ADR program, by making available a portion of the ADS fees charged in respect of the ADR program or otherwise, upon such terms and conditions as we and the depositary bank agree from time to time.
Amendments and Termination
We may agree with the depositary bank to modify the deposit agreement at any time without your consent. We undertake to give holders 30 days' prior notice of any modifications that would materially prejudice any of their substantial rights under the deposit agreement. We will not consider to be materially prejudicial to your substantial rights any modifications or supplements that are reasonably necessary for the ADSs to be registered under the Securities Act or to be eligible for book-entry settlement, in each case without imposing or increasing the fees and charges you are required to pay. In addition, we may not be able to provide you with prior notice of any modifications or supplements that are required to accommodate compliance with applicable provisions of law.
You will be bound by the modifications to the deposit agreement if you continue to hold your ADSs after the modifications to the deposit agreement become effective. The deposit agreement cannot be amended to prevent you from withdrawing the ordinary shares represented by your ADSs (except as permitted by law).
We have the right to direct the depositary bank to terminate the deposit agreement. Similarly, the depositary bank may in certain circumstances on its own initiative terminate the deposit agreement. In either case, the depositary bank must give notice to the holders at least 30 days before termination. Until termination, your rights under the deposit agreement will be unaffected.
After termination, the depositary bank will continue to collect distributions received (but will not distribute any such property until you request the cancellation of your ADSs) and sell the securities held on deposit. After the sale, the depositary bank will hold the proceeds from such sale and any other funds then held for the holders of ADSs in a non-interest bearing account. At that point, the depositary bank will have no further obligations to holders other than to account for the funds then held for the holders of ADSs still outstanding (after deduction of applicable fees, taxes and expenses).
Books of Depositary
The depositary bank will maintain ADS holder records at its depositary office. You may inspect such records at such office during regular business hours but solely for the purpose of communicating with other holders in the interest of business matters relating to the ADSs and the deposit agreement.
The depositary bank will maintain in New York facilities to record and process the issuance, cancellation, combination, split-up and transfer of ADSs. These facilities may be closed from time to time, to the extent not prohibited by law.
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Limitations on Obligations and Liabilities
The deposit agreement limits our obligations and the depositary bank's obligations to you. Please note the following:
•We and the depositary bank are obligated only to take the actions specifically stated in the deposit agreement without negligence or bad faith. 
•The depositary bank disclaims any liability for any failure to carry out voting instructions, for any manner in which a vote is cast or for the effect of any vote, provided it acts in good faith and in accordance with the terms of the deposit agreement.
•The depositary bank disclaims any liability for any failure to determine the lawfulness or practicality of any action, for the content of any document forwarded to you on our behalf or for the accuracy of any translation of such a document, for the investment risks associated with investing in the ordinary shares, for the validity or worth of the ordinary shares, for any tax consequences that result from the ownership of ADSs, for the credit-worthiness of any third party, for allowing any rights to lapse under the terms of the deposit agreement, for the timeliness of any of our notices or for our failure to give notice. 
•We and the depositary bank will not be obligated to perform any act that is inconsistent with the terms of the deposit agreement. 
•We and the depositary bank disclaim any liability if we or the depositary bank are prevented or forbidden from or subject to any civil or criminal penalty or restraint on account of, or delayed in, doing or performing any act or thing required by the terms of the deposit agreement, by reason of any provision, present or future of any law or regulation, or by reason of present or future provision of any provision of our memorandum and articles of association, or any provision of or governing the securities on deposit, or by reason of any act of God or war or other circumstances beyond our control. 
•We and the depositary bank disclaim any liability by reason of any exercise of, or failure to exercise, any discretion provided for in the deposit agreement or in our memorandum and articles of association or in any provisions of or governing the securities on deposit. 
•We and the depositary bank further disclaim any liability for any action or inaction in reliance on the advice or information received from legal counsel, accountants, any person presenting ordinary shares for deposit, any holder of ADSs or authorized representatives thereof, or any other person believed by either of us in good faith to be competent to give such advice or information. 
•We and the depositary bank also disclaim liability for the inability by a holder to benefit from any distribution, offering, right or other benefit that is made available to holders of ordinary shares but is not, under the terms of the deposit agreement, made available to you. 
•We and the depositary bank may rely without any liability upon any written notice, request or other document believed to be genuine and to have been signed or presented by the proper parties.
•We and the depositary bank also disclaim liability for any consequential or punitive damages for any breach of the terms of the deposit agreement. 
•No disclaimer of any Securities Act liability is intended by any provision of the deposit agreement.
•Nothing in the deposit agreement gives rise to a partnership or joint venture, or establishes a fiduciary relationship among us, the depositary bank and you as ADS holder.
•Nothing in the deposit agreement precludes Citibank (or its affiliates) from engaging in transaction in which parties adverse to us or the ADS owners have interests, and nothing in the deposit agreement obligated Citibank to disclose 
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those transactions, or any information obtained in the course of those transactions, to us or to the ADS owners, or to account for any payment received as part of those transactions.
As the above limitations relate to our obligations and the depositary bank’s obligations to you under the deposit agreement, we believe that, as a matter of construction of the clause, such limitations would likely to continue to apply to ADS holders who withdraw the ordinary shares from the ADS facility with respect to obligations or liabilities incurred under the deposit agreement before the cancellation of the ADSs and the withdrawal of the ordinary shares, and such limitations would most likely not apply to ADS holders who withdraw the ordinary shares from the ADS facility with respect to obligations or liabilities incurred after the cancellation of the ADSs and the withdrawal of the ordinary shares and not under the deposit agreement.
In any event, you will not be deemed, by agreeing to the terms of the deposit agreement, to have waived our or the depositary bank’s compliance with U.S. federal securities laws and the rules and regulations promulgated thereunder.  In fact, you cannot waive our or the depositary bank’s compliance with U.S. federal securities laws and the rules and regulations promulgated thereunder.
Pre-Release Transactions
The depositary bank has informed us that it no longer engages in pre-release transactions and has no intention to do so in the future.
Taxes
You will be responsible for the taxes and other governmental charges payable on the ADSs and the securities represented by the ADSs. We, the depositary bank and the custodian may deduct from any distribution the taxes and governmental charges payable by holders and may sell any and all property on deposit to pay the taxes and governmental charges payable by holders. You will be liable for any deficiency if the sale proceeds do not cover the taxes that are due.
The depositary bank may refuse to issue ADSs, to deliver, transfer, split and combine ADRs or to release securities on deposit until all taxes and charges are paid by the applicable holder. The depositary bank and the custodian may take reasonable administrative actions to obtain tax refunds and reduced tax withholding for any distributions on your behalf. However, you may be required to provide to the depositary bank and to the custodian proof of taxpayer status and residence and such other information as the depositary bank and the custodian may require to fulfill legal obligations. You are required to indemnify us, the depositary bank and the custodian for any claims with respect to taxes based on any tax benefit obtained for you.
Foreign Currency Conversion
The depositary bank will arrange for the conversion of all foreign currency received into U.S. dollars if such conversion is practical, and it will distribute the U.S. dollars in accordance with the terms of the deposit agreement. You may have to pay fees and expenses incurred in converting foreign currency, such as fees and expenses incurred in complying with currency exchange controls and other governmental requirements.
If the conversion of foreign currency is not practical or lawful, or if any required approvals are denied or not obtainable at a reasonable cost or within a reasonable period, the depositary bank may take the following actions in its reasonable discretion:
•convert the foreign currency to the extent practical and lawful and distribute the U.S. dollars to the holders for whom the conversion and distribution is lawful and practical; 
•distribute the foreign currency to holders for whom the distribution is lawful and practical; and 
•hold the foreign currency (without liability for interest) for the applicable holders.
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Governing Law/Waiver of Jury Trial
The deposit agreement and the ADRs will be interpreted in accordance with the laws of the State of New York. The rights of holders of ordinary shares (including the ordinary shares represented by ADSs) is governed by the laws of the Cayman Islands. 
AS A PARTY TO THE DEPOSIT AGREEMENT, YOU IRREVOCABLY WAIVE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, YOUR RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF THE DEPOSIT AGREEMENT OR THE ADRs AGAINST US AND/OR THE DEPOSITARY BANK.
The deposit agreement provides that, to the extent permitted by law, ADS holders waive the right to a jury trial of any claim they may have against us or the depositary bank arising out of or relating to our ordinary shares, the ADSs or the deposit agreement, including any claim under U.S. federal securities laws.  If we or the depositary bank opposed a jury trial demand based on the waiver, the court would determine whether the waiver was enforceable in the facts and circumstances of that case in accordance with applicable case law.  However, you will not be deemed, by agreeing to the terms of the deposit agreement, to have waived our or the depositary bank’s compliance with U.S. federal securities laws and the rules and regulations promulgated thereunder.




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