Document:

EX-10.8

 Exhibit 10.8 

English Translation 

Exclusive Technical Support and Service Agreement 

This Exclusive Technical Support and Service Agreement (the “Agreement”) is entered into by and between the following parties on
December 21, 2018 in Shanghai, the People’s Republic of China (the “PRC”): 
 Party A: Shanghai MOHUA
Information Technology Co., Ltd., a wholly-foreign-owned enterprise legally established and validly existing under the laws of the PRC, with its registered address at Room 108, 26 Jiafeng Road, China (Shanghai) Pilot Free Trade Zone, and
its legal representative being Dongliang Chang; 
 Party B: Shanghai MOLBASE Technology Co., Ltd., a limited liability company legally
established and validly existing under the laws of the PRC, with its registered address at Tower A, Room 501, Building 12, 1001 North Qinzhou Road, Xuhui District, Shanghai, and its legal representative being Dongliang Chang. 

Party A and Party B are each referred to as a “Party” and collectively referred to as “Parties”. 

WHEREAS 
  

	1	 Party A is a wholly-foreign-owned enterprise established in the PRC, which has the necessary recourses to
provide technical support and consulting services; 

  

	2	 Party B is a domestic company established in the PRC and is permitted by PRC government authorities to engage
in the development of data technology, development and sale of computer software and hardware, digital products and telecommunication products, design and installation of network projects, e-commerce
(value-added telecommunications and financing are not permitted), design and production of advertisements, publications of advertisements on its own medium, computer system service, technology development, consulting and service in computer
information engineering, sale of raw chemical materials and products (excluding hazardous chemicals, controlled chemicals, fireworks, civil explosives and precursor chemicals), imports and exports of goods and technology (the “Principal
Business”); 

  

	3	 Party A is willing to provide Party B with exclusive technical and business support and consulting services in
connection with the Principal Business during the term of this Agreement, utilizing its advantage in technology, human resources and information and Party B is willing to accept such services provided by Party A or Party’s designees(s), each on
the terms set forth herein. 

 THEREFORE, the Parties have reached the following agreements after kind discussions and negotiations:

 Chapter 1 Exclusive Business Cooperation 
  

	1	 Party A shall, in accordance with the terms and conditions of this Agreement, as the exclusive service provider
of Party B, provide Party B with comprehensive technical and business support and relevant consulting services, including but not limited to, technical service, business consultation, asset and equipment lease, market consultation, system
integration, product R&D and system maintenance. (the “Service”). 

  

	2	 The Parties agree that Party A may designate other parties (the “Designee(s)”) to provide the
Service set forth in the above Article 1. 

  

	3	 Party B shall accept the Service rendered by Party A or the Designee(s) in accordance with the above Article 1.

  

	4	 Unless with Party A’s prior written consent, during the term of this Agreement, Party B shall not directly
or indirectly accept the same or similar services provided by any third party and shall not establish any similar cooperation relationship with any third party regarding the matters contemplated by this Agreement. 

Chapter 2 Service Provision 
  

	5	 During the term of this Agreement, where necessary, Party B may enter into further service agreements with
Party A or the Designee(s), which shall provide the specific contents, manner, personnel and fees for the specific service. 

  

	6	 To fulfill this Agreement, during the term of this Agreement, where necessary, Party B may at any time enter
into equipment or property lease agreement with Party A or the Designee, according to which Party A or the Designee shall provide relevant equipment and/or property to Party B. 

Chapter 3 Price and Payment of the Service 
  

	7	 Both Parties agree that, in consideration of the Service provided by Party A or the Designee, Party B shall pay
Party A service fees (the “Service Fees”). 

  

	8	 Both Parties agree that the Service Fees shall be due and payable on a quarterly basis. Service Fees for each
quarter is     % of Party B’s before-tax profits of that period, and Party A has the right to unilaterally adjust Service Fees by serving written notice to Party B.

  

	9	 If Party B fails to pay the Service Fees pursuant to this Agreements, Party B is subject to a penalty equal to
0.05% of the due amount on a daily basis. 

  

	10	 The Service Fees, liquidated damages, actual costs and indemnification due and payable by Party B and Party
B’s obligations under this Agreement shall be secured by Party B shareholders’ pledge to Party A of their equity interests in Party B. 

  
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 Chapter 4 Representations and Warranties 

 

	11	 Party A hereby makes the representations and warranties to Party B as follows: 

 

	 	11.1	 Party A is an enterprise legally established and validly existing under the laws of the PRC. It legally owns
and operates its assets and has full power to conduct its business. 

  

	 	11.2	 Party A has taken all necessary corporate actions and obtained necessary authorizations as well as consents and
approvals from government authorities and third parties (if required) for the execution, delivery and performance of this Agreement. The execution, delivery and performance of this Agreement by Party A will not violate the explicit provisions of the
laws and regulations, nor will they violate any provisions under any instrument by which it is bound; 

  

	 	11.3	 This Agreement constitutes legal, valid and binding obligation of Party A once becomes effective.

  

	12	 Party B makes the representations and warranties to Party A as follows: 

 

	 	12.1	 Party B is an enterprise legally established and validly existing under the laws of the PRC. It legally owns
and operates its assets and has full power to conduct its business. 

  

	 	12.2	 Party B has taken all necessary corporate actions and obtained all necessary authorizations as well as consents
and approvals from government authorities and third parties (if required) for the execution, delivery and performance of this Agreement. The execution, delivery and performance of this Agreement will not violate the explicit provisions of the laws
and regulations, nor will they violate any provisions under any instrument by which it is bound; 

  

	 	12.3	 As of the date of this Agreement, there is no pending or threatened litigation, arbitration or administrative
proceedings against Party B or its assets in relation to this Agreement or may have a material impact on this Agreement; 

  

	 	12.4	 Party B warrants the authenticity, completeness, legality and validity of the financial statements, business
materials and all relevant materials provided to Party A; 

  

	 	12.5	 This Agreement constitutes legal, valid and binding obligation of Party B once becomes effective.

  
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 Chapter 5 Liabilities and Obligations 

 

	13	 Except as otherwise set forth in this Agreement, Party A shall: 

 

	 	13.1	 provide Service in accordance with the terms and conditions as set forth in this Agreement;

  

	 	13.2	 strictly perform its obligations under this Agreement and any relevant agreement to which it is a party.

  

	14	 Except as otherwise set forth in this Agreement, Party B shall also: 

 

	 	14.1	 according to regulations in Chapter 3, pay the Service Fee fully and timely; 

 

	 	14.2	 conduct neither research nor development of technology relating to the Service. Any technology resulting from
the research and, development relating to the Service and any relevant intellectual property rights shall be owned by Party A if such research and development is conducted upon Party A’s prior consent; 

 

	 	14.3	 without the prior written consent of Party A, not assign its rights or delegate its obligations under this
Agreement; 

  

	 	14.4	 without the prior written consent of Party A, not conduct activities outside its Principal Business;

  

	 	14.5	 without the prior written consent of Party A, not provide loans to any third party or incur indebtedness;

  

	 	14.6	 without the prior written consent of Party A, not sell, transfer or dispose of in any manner its assets, or
create any mortgage, pledge or other encumbrance on the foregoing; 

  

	 	14.7	 notify Party A timely of any situation that has created or may create material adverse effect to Party B’s
business operation, and use its best efforts to prevent the occurrence of such situations and/or additional loss; 

  

	 	14.8	 strictly perform its obligations under this Agreement and any relevant agreement to which it is a party;

  

	 	14.9	 To ensure that Party B fully perform its obligations under this Agreement, Party B hereby agrees and undertakes
that, except for Party A’s prior written consent, during the term of this Agreement, Party B shall not take and conduct any actions or transactions that materially affects its business, property, operation, personnel and other relevant rights
and obligations, including but not limited to: 

  

	 	(1)	 conducting activities outside of its business scope as set forth in the business license;

  

	 	(2)	 providing loans to or assuming any indebtedness for any third party except Party A; 

  
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	 	(3)	 changing or firing the chairman of the board or the directors of Party B, or changing or replacing senior
management members including the general manager (the chief execution officer), the chief financial officer and the technology controller (the chief technology officer); 

 

	 	(4)	 transferring any property or right to any third party except Party A, including but not limited to intellectual
property; 

  

	 	(5)	 providing security for any third party except for Party A, or imposing any encumbrance on Party B or Party
B’s property. For the purpose of this Agreement, “encumbrance” shall include mortgage, pledge, lien, option, right to sale, preemptive rights, right of first refusal or security interest of any kind; 

 

	 	(6)	 amending or changing the articles of associations or the business scope of Party B; 

 

	 	(7)	 altering Party B’s routine operations, operating procedures or any internal policies and rules, including
but not limited to the financial management procedures, rules of procedures of the shareholders meetings and/or the board meetings, the company’s daily operation rules and procedures and etc.; 

 

	 	(8)	 conducting any transaction that is identical or similar to that under this Agreement with any third party other
than Party A or the Designee, or executing any intellectual property assignment or license agreement. 

 Chapter 6
Confidentiality 
  

	15	 This Agreement and its terms, any technology, craft, method, specification, design, software, database, trade
secret, and other proprietary information, and other confidential business information and technical information disclosed by one Party to the other Parties in accordance with this Agreement or other provisions shall be deemed as confidential
information. 

  

	16	 The Parties shall take all necessary security measures and preventive methods to protect the confidentiality of
the confidential information. Such security measures and preventive methods shall be consistent with the measures and preventions taken to protect its own sensitive information. In any event such measures and preventions shall be no less than the
standard that a reasonable business entity would take to protect its highly confidential information and trade secrets. 

  

	17	 The Party acquiring the confidential information shall not disclose any of such confidential information to any
third party without obtaining the prior written consent from the owner of the confidential information. 

  
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	18	 The Party acquiring the confidential information: (1) may disclose confidential information to designated
employees on a need-to-know basis in order to perform this Agreement, but shall take all reasonable preventive measures (including the execution of a non-disclosure agreement with the designated employee or the insertion of a non-disclosure clause into the employment contract executed by the designated employee) to prevent
such employee to use the confidential information for personal interest or disclose such confidential information to third parties without permission; (2) may disclose confidential information to professionals including counsels and accountants
as are necessary to provide professional assistance, but shall ensure such agencies are bound by confidentiality obligations similar to this clause. Disclosure of any confidential information by any staff member or agency engaged by any Party shall
be deemed as disclosure of such information by such Party, which Party shall be held liable for breach of this Agreement. 

  

	19	 The following situations shall not be deemed as violation of confidentiality obligations: (1) confidential
information that has been known to that Party before the disclosure; (2) confidential information legally acquired from third parties without breach of confidentiality; (3) confidential information publicly known without default of such
Party; (4) information developed independently by such Party without directly or indirectly using confidential information; or (5) confidential information required to be disclosed by applicable laws, legal proceedings or judicial order,
any applicable rules or regulations of stock exchanges, or government orders or decrees. 

  

	20	 This Chapter shall remain in full force following modification, rescission or termination of this Agreement.

 Chapter 7 Event of Default 
  

	21	 Each of the following circumstances of either Party is deemed as default: 

 

	 	21.1	 fails to perform, fails to complete the performance, or fails to perform its liabilities and obligations in
accordance with the terms and conditions under the Master Agreements or this Agreement; 

  

	 	21.2	 any of the representations and warranties made constitute material misrepresentation in any aspect;

  

	 	21.3	 other circumstances of breach of this Agreement. 

 

	22	 Any defaulting Party shall cure its default within thirty (30) days. 

 

	23	 In the event that the other Party suffered from any losses due to one Party’s default, the defaulting
Party shall, to the extent permitted by law, indemnify the other Party for suffered losses. 

  

	24	 The rights and remedies provided under this Chapter shall be accumulative and shall not affect any other rights
and remedies stipulated by the laws and other provisions in this Agreement. 

  
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	25	 Any waiver of the breach of the defaulting Party must be provided in writing.
Non-exercise or delay in exercising any rights or remedies under this Agreement shall not deemed as such Party’s waiver; partial exercise of rights or remedies of one Party shall not impede its exercise
of any other rights or remedies. 

  

	26	 This Chapter shall remain in full force following modification, rescission or termination of this Agreement.

 Chapter 8 Force Majeure 
  

	27	 “Force majeure” refers to events that are unpredictable, unavoidable and cannot be overcame,
including but not limited to earthquake, typhoon, flood, fire, war, riot, strikes, governmental acts and etc. 

  

	28	 A Party’s failure to perform its obligations under this Agreement due to direct effect of Force Majeure is
not in default if: 

  

	 	28.1	 such Party’s failure to perform its obligations under this Agreement is directly caused by the Force
Majeure; 

  

	 	28.2	 such Party has exhausted its commercially reasonable efforts to perform its obligation hereunder, and has taken
necessary measures to mitigate the losses suffered by the other Parties resulting from the Force Majeure; 

  

	 	28.3	 such Party has notified the other Parties immediately in writing after the Force Majeure and has provided the
relevant written materials and supportive documentation within fifteen (15) days following the Force Majeure, including a statement of explanations for the deferred performance or partial performance of this Agreement. 

 

	29	 Provided that there is an event of Force Majeure and the affected Party cannot continue to perform its material
obligations hereunder within forty-five (45) days after the Force Majeure, after using its best efforts to avoid or eliminate such effects, the Parties shall decide whether or not to amend this Agreement depending on the effect of the Force
Majeure, and the other Party has the right to decide whether or not to waive part or all of the responsibilities and obligations of the affected party under this Agreement. 

Chapter 9 Governing Law and Disputes Resolution 
  

	30	 The execution, effectiveness, construction, performance, amendment and termination of this Agreement and the
resolution of disputes hereunder shall be governed by the laws of the PRC. 

  

	31	 In the event of any dispute with respect to this Agreement, the Parties shall first resolve the dispute through
friendly negotiations. In the event the Parties fail to reach an agreement on the dispute within thirty (30) days after either Party’s written request to the other Party for resolution of the dispute through negotiations, either Party may
submit the relevant dispute to China International Economic and Trade Arbitration Commission for arbitration in accordance with its arbitration rules. The arbitration shall be seated in Shanghai and the language for arbitration shall be in Chinese.

  
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	32	 The arbitration award shall be final and binding to all Parties. The Parties agree to be bound by and act in
accordance with the arbitration award. Unless otherwise awarded by the arbitration court, the losing party should bear all the arbitration fees and expenses. 

  

	33	 During the pending arbitration of any dispute, except for the matters under dispute, the Parties shall continue
to exercise their respective rights and perform their respective obligations under this Agreement 

  

	34	 This Chapter shall remain in full force following modification, rescission or termination of this Agreement.

 Chapter 10 Term of Agreement 
  

	35	 This Agreement shall become effective on the date of this Agreement. Unless terminated in accordance with the
provisions of this Agreement or terminated by the other agreements between the Parties, the effective term of this Agreement shall be ten (10) years. 

  

	36	 Prior to the expiration of the term of this Agreement, upon written confirmation by Party A, this Agreement can
be renewed. The renewed term shall be decided by Party A, And Party B shall unconditionally agree to such renewal. 

  

	37	 This Agreement is irrevocable during the term, except as otherwise instructed by Party A in writing. During the
term of this Agreement, Party B may not terminate this Agreement in advance. Notwithstanding the foregoing, Party A may terminate this Agreement at any time by serving a thirty (30) day prior written notice to Party B. 

Chapter 11 Miscellaneous 
  

	38	 This Agreement shall be binding upon all Parties’ successors and permitted assignees. With a prior notice
to Party B, Party A has the right to assign and/or delegate to a third party its rights and/or obligations under this Agreement at any time, which assignment or delegation is not subject to Party B’s consent. 

 

	39	 Party B shall not amend this Agreement unilaterally. Any amendment and supplement to this Agreement may be made
in written agreement. The amendment and supplementary entered into by the Parties relating to this Agreement shall be an integral part of this Agreement and shall have the equal effect with this Agreement. 

 

	40	 In the event this Agreement and its appendices, amendments and supplements conflict with the laws of the PRC,
the mandatory laws shall prevail. 

  
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	41	 In the event one or several of the provisions of this Agreement are found to be invalid, illegal or
unenforceable in any aspect in accordance with any laws or regulations, the validity, legality or enforceability of the remaining provisions of this Agreement shall not be affected or compromised in any respect. The Parties shall negotiate in good
faith to replace such invalid, illegal or unenforceable provisions with effective provisions that accomplish to the greatest extent permitted by law and the intentions of the Parties, and the economic effect of such effective provisions shall be as
close as possible to the economic effect of those invalid, illegal or unenforceable provisions. 

  

	42	 This Agreement is written in Chinese. The original may be made into one or multiple counterparts, each
counterpart shall have equal legal effect. 

 (The remainder of this page intentionally left blank; signature page follows)

  
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 Signature Page to Exclusive Technical Support and Service Agreement. 

 

					
	Party A: Shanghai MOHUA Information Technology Co., Ltd.
		
	      (Company Seal)	 	
			
	      By:	 	 /s/ Dongliang Chang
	 	
	      Name:	 	Dongliang Chang	 	
	      Title:	 	Legal Representative	 	
	
	Party B: Shanghai MOLBASE Technology Co., Ltd.
		
	      (Company Seal)	 	
			
	      By:	 	 /s/ Dongliang Chang
	 	
	      Name:	 	Dongliang Chang	 	
	      Title:	 	Legal Representative	 	

  
 10EX-10.9

 Exhibit 10.9 

Equity Pledge Agreement 
 This Equity
Pledge Agreement (the “Agreement”) is entered into by and between the following parties on December 21, 2018 in Shanghai, the People’s Republic of China (the “PRC”): 

Party A (Pledgee): Shanghai MOHUA Information Technology Co., Ltd., a wholly foreign owned enterprise legally established and validly existing
under the laws of the PRC, with its registered address at Room 108, 26 Jiafeng Road, China (Shanghai) Pilot Free Trade Zone, and its legal representative being Dongliang Chang; 

Party B (Pledgors): 
 Dongliang Chang

 Identification No.: 

Zhengyu Wu 

Identification No.: 
 Zhejiang
Xingke Technology Development Investment Co., Ltd. (“Zhejiang Xingke”) 
 A domestic company
legally established and validly existing under the laws of the PRC, with its registered address at 3339 Linggongtang Road, Nanhu District, Jiaxing, and its legal representative being Cheng Qian. 

Party C: Jiaxing MOLBASE Information Technology Co., Ltd., a limited liability company legally established and validly existing under the laws
of the PRC, with its registered address at Room 6-608, 778 Yatai Road (Jiaxing Science City), Nanhu District, Jiaxing, and its legal representative being Dongliang Chang. 

Party A, Party B and Party C are individually referred to as a “Party”, and collectively referred to as the “Parties”. 

WHEREAS 
  

	1	 Party C is a domestic company registered in the PRC with a registered capital of RMB1,500,000. Party B, being
Party C’s all shareholders, hold 100% of Party C’s equity interests, among which 76% of Party C’s equity interests representing RMB1,140,000 in the registered capital are held by Dongliang Chang, 19% of the equity interests of Party C
representing RMB285,000 in the registered capital are held by Zhengyu Wu, and 5% of the equity interest of Party C representing RMB 75,000 in the registered capital are held by Zhejiang Xingke; 

 

	2	 On December 21, 2018, Party A and Party C signed an Exclusive Technical Support and Services Agreement;

	3	 On December 21, 2018, Party A, Party B and Party C signed a Shareholders’ Voting Rights Proxy
Agreement, and an Exclusive Option Agreement (the Shareholders’ Voting Right Proxy Agreement, the Exclusive Option Agreement, and the Exclusive Technical Support and Services Agreement are collectively referred to as the “Master
Agreements”); 

  

	4	 To ensure that Party B and Party C fully and timely perform their liabilities and obligations under the Master
Agreements, Party B pledges all the Equity Interest (as defined below) to Party A it holds. 

  

	5	 The Parties hereby acknowledge and agree to the execution and performance of this Agreement, and the
liabilities and obligations of the Parties hereunder, and agree unanimously to provide any and all assistance necessary to register the Pledge (as defined below). 

THEREFORE, the Parties have reached the following agreements after amicable consultation and negotiation: 

Chapter 1 Definitions 
  

	1	 Unless otherwise provided herein, the terms below shall have the following meanings: 

 

	 	1.1	 “Equity Interest” refers to all of the equity interests held by Party B in Party C.

  

	 	1.2	 “Pledge” refers to the right of Party A to be compensated on a preferential basis with the
conversion, auction or sales price of the Equity Interests pledged by Party B to Party A. 

  

	 	1.3	 “Term of Pledge” has the meaning set forth in Article 5 below. 

 

	 	1.4	 “Notice of Default” refers to the notice served by Party A in accordance with this Agreement
declaring default of Party B and/or Party C. 

 Chapter 2 The Pledge 

 

	2	 Party B hereby pledges to Party A the Equity Interest, as security for the timely and complete performance of
all the liabilities and obligations of Party B and Party C under the Master Agreements. The aforesaid liabilities and obligations include but are not limited to service fee and expenses payable to Party A by Party C, the losses, interests,
liquidated damages, indemnification, expenses for enforcement of creditor rights payable to Party A by Party B and/or Party C to Party A, and the liabilities payable to Party A by Party B and Party C in the event that any agreement is in whole or in
part void for any reason. 

	3	 Unless otherwise agreed by Party A in writing, the Pledge hereunder shall not be released until Party B and
Party C have timely and completely performed all their responsibilities and obligations under the Master Agreements which has been confirmed by Party A in writing. 

 

	4	 Upon the expiration of the term as provided in the Master Agreements, if Party B or Party C has not fully
performed its responsibilities and obligations in part or in full, Party A shall continue to enjoy the Pledge as provided in this Agreement until the complete performance of the aforesaid responsibilities and obligations. 

Chapter 3 Term of Pledge; Approval and Registration of Pledge 
  

	5	 The Pledge shall become effective on such date when the pledge of the Equity Interest contemplated herein is
registered in Party C’s register of shareholders and is registered with the relevant administration for industry and commerce. The Pledge shall be valid until the latest of: (1) all Party C’s responsibilities and obligations under the
Master Agreements are fully performed and terminated; (2) all amounts payable by Party C to Party A under the Master Agreements are settled; and (3) any losses of Party A due to Party B and/or Party C’s default in performing their
obligations under the Master Agreements are recovered (“Term of Pledge”). 

  

	6	 Party C shall register the Pledge in Party C’s register of shareholders within three (3) business
days following the execution of this Agreement. 

  

	7	 Each Party shall submit the application to the relevant administration for industry and commerce for the
registration of the Pledge of Equity Interest within ten (10) business days following the execution of this Agreement. 

  

	8	 During the Term of Pledge, in the event Party B and/or Party C fails to perform their responsibilities or
obligations pursuant to the Master Agreements, Party A shall have the right, but not the obligation, to dispose of the Pledge in accordance with the provisions of this Agreement. 

Chapter 4 Custody of Records for Equity Interests Subject to Pledge 

 

	9	 Party B shall deliver to Party A’s custody the original copy of its capital contribution certificate
reflecting Party A’s pledge within five (5) business days following the execution of this Agreement. Party A shall have custody of such items during the entire Term of Pledge. 

 

	10	 During the Term of Pledge, Party A is entitled to all dividends, and other cash and non-cash gains derived from the pledged Equity Interests. 

 Chapter 5 Representations and Warranties of Party B and Party C 

 

	11	 Party B and Party C severally and jointly make the following representations and warranties to Party A:

  

	 	11.1	 Each of Dongliang Chang and Zhengyu Wu has full civil conduct capacity. Zhejiang Xingke is an enterprise
legally established and validly existing under the laws of the PRC. Party C is an enterprise legally established and validly existing under the laws of the PRC. 

 

	 	11.2	 Party B is the legal and beneficial owner of the Equity Interests and has paid up all committed capital
contribution. 

  

	 	11.3	 Except for the Pledge, Party B has not placed any security interest or other encumbrance on the Equity
Interest; 

  

	 	11.4	 The Pledge acquired by Party A in accordance with this Agreement shall not be interrupted or damaged by Party B
or any heirs or agents of Party B or any other person through any legal proceedings. 

  

	 	11.5	 Party B and Party C have taken all necessary actions and obtained necessary authorizations as well as consents
and approvals from applicable government authorities and third parties (if required) for the execution, delivery and performance of this Agreement. The execution, delivery and performance of this Agreement by Party B and Party C will not violate any
laws and regulations, agreements or other instruments by which it is bound; 

  

	 	11.6	 As of the date of this Agreement, there is no pending or threatened litigation, arbitration or administrative
proceeding against Party B, Party C or their assets that is relating to this Agreement or may have a material impact on this Agreement; 

  

	 	11.7	 This Agreement constitutes legal, valid and binding obligations of Party B and Party C upon its effectiveness.

 Chapter 6 Party B’s Responsibilities and Obligations 

 

	12	 Except as otherwise provided herein, during the Term of Pledge, Party B shall: 

 

	 	12.1	 without Party A’s prior written consent, not assign its rights or delegate its obligations under this
Agreement; 

  

	 	12.2	 without Party A’s prior written consent, not transfer the Equity Interest, and not place or permit the
existence of any other pledge or other encumbrance on the Equity Interest; 

  

	 	12.3	 to the extent permitted by laws of the PRC, dividends and distributions (if any) on the Equity Interests shall
be unconditionally owned by Party A or any person designated by Party A. 

  

	 	12.4	 execute in good faith all necessary certificates of rights and/or agreements at Party A’s request, perform
acts as required by Party A, and facilitate the exercise of Party A’s rights and/or authorizations granted hereunder; 

	 	12.5	 comply with and carry out all the laws and regulations relating to the pledge of rights; and within five
(5) wording days upon receipt of any notice, order or recommendation issued or served by the relevant competent authorities regarding the Pledge, present such notice, order or recommendation to Party A, and concurrently comply with such notice,
order or recommendation, or object thereto upon the reasonable request or consent of Party A; 

  

	 	12.6	 promptly notify Party A of any event that may affect the Equity Interests, or may change Party B’s
warranties, obligations in this Agreement, or impact Party B’s performance of its obligations in this Agreement; 

  

	 	12.7	 comply with and perform all the representations, warranties, undertakings and obligations. In the event that
Party B fails to perform or fails to fully perform its representations, warranties, undertakings or obligations, Party B shall indemnify Party A against all the loss resulting therefrom; 

 

	 	12.8	 In case of regulatory changes or other legal requirements, Party B shall use its best efforts to complete all
the required legal procedures, including without limitation, register with the administration of industry and commerce to maintain the validity of the Pledge and its full legal effect against third parties. 

Chapter 7 Event of Default and Exercise of Pledge 
  

	13	 Each of the following circumstances of Party B or Party C shall be deemed as a default: 

 

	 	13.1	 fails to perform, fails to perform fully, or fails to perform its liabilities and obligations in accordance
with the terms and conditions under the Master Agreements or this Agreement; 

  

	 	13.2	 any of the representations and warranties made hereunder or in the Master Agreements constitute material
misrepresentation in any respect; 

  

	 	13.3	 other circumstances of breach of the Master Agreements or this Agreement; 

 

	 	13.4	 where the promulgation of applicable laws renders this Agreement illegal or renders it impossible for Party B
to continue to perform its obligations under this Agreement, Party B refuses to remedy where it is remediable and as such renders the performance of this Agreement implausible; 

 

	 	13.5	 any of Party B’s indebtedness, securities, indemnifications, covenants or any other liabilities
(1) become accelerated for repayment or performance due to default; or (2) become due but are not capable of being repaid or performed timely, which causes Party A to believe that Party B’s ability to perform its obligations under the
Master Agreements or this Agreement has been affected; 

	 	13.6	 adverse changes in properties owned by Party B occur which causes Party A to believe that Party B’s
ability to perform its obligations under the Master Agreement or this Agreement has been affected. 

  

	 	13.7	 where any approval, license, permit or authorization of government authorities that makes this Agreement
enforceable, legal and effective is withdrawn, suspended, invalidated or substantively changes, Party B is able to take remedial measures but refuses to; 

  

	 	13.8	 other circumstance under which Party A may not dispose of the Pledge according to the law.

  

	14	 In the event that Party B or Party C is in default under Article 13.1, 13.2, or 13.3, which causes Party A and
its directors, senior management, senior officers, employees and others to incur any costs, liabilities, or suffer any losses, Party B shall indemnify Party A and hold it harmless against such costs, liabilities and losses resulting therefrom.

  

	15	 If Party B or Party C is in default, Party A shall serve a Notice of Default on Party B and/or Party C. Party A
may exercise the right to dispose of the Pledge, or require Party B and/or Party C to timely perform the Master Agreements concurrently with or at any time after serving the written Notice of Default. Unless an event of default as set forth in
Article 13 has been successfully resolved to Party A’s satisfaction, Party B shall not place other pledge on the Equity Interests or transfer the Equity Interest. 

 

	16	 Upon Party A’s election to exercise its right to dispose of the Pledge, Party B shall no longer own any
right or interest in respect of the Equity Interest. 

  

	17	 When Party A disposes of the Pledge in accordance with this Agreement, the Parties shall not hinder Party A in
enforcing its rights, and shall provide necessary assistance to enable Party A to enforce the Pledge. 

  

	18	 If Party B disposes of the pledged Equity Interests through legal procedures, Party A is not obligated to pay
the proceeds from the disposal to Party B. Party B hereby waives its right to claim the proceeds from Party A’s disposal of the pledged Equity Interests. If Party A is not fully compensated for the service fee under the Master Agreements after
the disposal of the pledged Equity Interests, Party B will not assume any further obligations. 

  

	19	 During the Term of Pledge, if Party B subscribes for Party C’s registered capital increase, or acquires
Party C’s equity interest held by other Pledgees (in each case the “New Equity”), such New Equity automatically becomes pledged Equity Interests under this Agreement. Party B shall complete the procedure for placing pledge on
such New Equity within ten (10) working days after acquisition of the New Equity. If Party B fails to complete the abovesaid relevant procedure, Party A is entitled to exercise its pledge pursuant to this Agreement. 

 

	20	 This Chapter shall survive the termination of this Agreement. 

 Chapter 8 Handling Fees and Other Expenses 

 

	21	 All fees and out of pocket expenses related to this Agreement, including but not limited to legal costs, costs
of production, stamp duty and any other taxes and expenses, shall be borne by Party B and Party C. If it is stipulated by laws that such taxes should be paid by Party A, Party B and Party C shall compensate Party A for such taxes paid by Party A in
full. 

  

	22	 If Party B and Party C fail to pay any tax or fees payable in accordance with the provisions hereof, or fail to
proactively perform their obligations under this Agreement which causes Party A to take any measures to recover the indebtedness, Party B shall bear all expenses incurred therefrom (including but not limited to various taxes, handling fees,
management fees, legal fees, attorney fees, various insurance premiums, and others for handling the right of pledge). 

Chapter 9 Force Majeure 
  

	23	 “Force majeure” refers to events that are unpredictable, unavoidable and cannot be overcame,
including but not limited to earthquake, typhoon, flood, fire, war, riot, strikes, governmental acts and etc. 

  

	24	 A Party’s failure to perform its obligations under this Agreement due to direct effect of Force Majeure is
not in default if: 

  

	 	24.1	 such Party’s failure to perform its obligations under this Agreement is directly caused by the Force
Majeure; 

  

	 	24.2	 such Party has exhausted its commercially reasonable efforts to perform its obligation hereunder, and has taken
necessary measures to mitigate the losses suffered by the other Parties resulting from the Force Majeure; 

  

	 	24.3	 such Party has notified the other Parties immediately in writing after the Force Majeure and has provided the
relevant written materials and supportive documentation within fifteen (15) days following the Force Majeure, including a statement of explanations for the deferred performance or partial performance of this Agreement. 

 

	25	 In the event of Force Majeure, each Party shall use its best efforts to cure or take other actions to continue
the performance of this Agreement. 

 Chapter 10 Governing Law and Dispute Resolution 

 

	26	 The execution, effectiveness, construction, performance, amendment and termination of this Agreement and the
resolution of disputes hereunder shall be governed by the laws of the PRC. 

	27	 In the event of any dispute with respect to this Agreement, the Parties shall first resolve the dispute through
friendly negotiations. In the event the Parties fail to reach an agreement on the dispute within thirty (30) days after either Party’s written request to the other Parties for resolution of the dispute through negotiations, either Party
may submit the relevant dispute to the China International Economic and Trade Arbitration Commission for arbitration, in accordance with its arbitration rules. The arbitration shall be seated in Shanghai and the language for arbitration shall be in
Chinese. 

  

	28	 The arbitration award shall be final and binding on all Parties. The Parties agree to be bound by and act in
accordance with the arbitration award. Unless otherwise awarded by the arbitration court, the losing party should bear all the arbitration fees and expenses. 

  

	29	 During the pending arbitration of any dispute, except for the matters under dispute, the Parties shall continue
to exercise their respective rights and perform their respective obligations under this Agreement. 

  

	30	 This Chapter shall remain in full force following the modification, rescission or termination of this
Agreement. 

 Chapter 11 Miscellaneous 
  

	31	 This Agreement shall be binding upon each Parties’ successors and permitted assignees.

  

	32	 This Agreement is irrevocable during the term unless otherwise instructed by Party A in writing. Party B and/or
Party C shall not amend this Agreement unilaterally. Any amendment and supplement to this Agreement may be made in written agreement. The amendment agreements and supplementary agreements entered into by the Parties relating to this Agreement shall
be an integral part of this Agreement and shall have the equal effect with this Agreement. 

  

	33	 In the event this Agreement and its appendices, amendments and supplements conflict with the laws of the PRC,
the mandatory laws shall prevail. 

  

	34	 In the event one or several of the provisions of this Agreement are found to be invalid, illegal or
unenforceable in any aspect in accordance with any laws or regulations, the validity, legality or enforceability of the remaining provisions of this Agreement shall not be affected or compromised in any respect. The Parties shall negotiate in good
faith to replace such invalid, illegal or unenforceable provisions with effective provisions that accomplish to the greatest extent permitted by law and the intentions of the Parties, and the economic effect of such effective provisions shall be as
close as possible to the economic effect of those invalid, illegal or unenforceable provisions. 

  

	35	 This Agreement is written in Chinese. The original may be made into one or multiple counterparts, each
counterpart shall have equal legal effect. 

 (The remainder of this page intentionally left blank; signature page follows)

 Signature Page to Equity Pledge Agreement 

 

					
	Party A: Shanghai MOHUA Information Technology Co., Ltd.
		
	      (Company Seal)	 	
			
	      By:	 	 /s/ Dongliang Chang
	 	
	      Name:	 	Dongliang Chang	 	
	      Title:	 	Legal Representative	 	
		
	Party B:	 	
		
	      Dongliang Chang	 	
			
	      By:	 	 /s/ Dongliang Chang
	 	
		
	      Zhengyu Wu	 	
			
	      By:	 	 /s/ Zhengyu Wu
	 	
	
	      Zhejiang Xingke Technology Development Investment Co., Ltd.
		
	      (Company Seal)	 	
			
	      By:	 	 /s/ Cheng Qian
	 	
	      Name:	 	Cheng Qian	 	
	      Title:	 	Legal Representative	 	
	
	Party C: Jiaxing MOLBASE Information Technology Co., Ltd.
		
	      (Company Seal)	 	
			
	      By:	 	 /s/ Dongliang Chang
	 	
	      Name:	 	Dongliang Chang	 	
	      Title:	 	Legal Representative

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