Document:

EX-4.4

 Exhibit 4.4 

THIS SUPPLEMENTAL AGREEMENT is entered into on December 26, 2018 

BETWEEN: 
  

	(1)	 Fundament Limited (“Fundament”), a company incorporated in Hong Kong Special Administrative
Region of PRC, in accordance with the law thereof with the domicile at Flat G Floor 7 Mega Cube, 8 Wangkwong Road, Kowloon Bay, Kowloon, Hong Kong; 

  

	(2)	 Xu He, the sole owner and director of Fundament, a natural person with the PRC citizenship, with his
domicile at Apt. 1603 No. 25 Court, 206 West Xingang Road, Haizhu District, Guangzhou, PRC; 

  

	(3)	 Dawnlight Limited (“Dawnlight”), a company incorporated in Hong Kong Special Administrative
Region of PRC, in accordance with the law thereof with the domicile at Flat G Floor 7 Mega Cube, 8 Wangkwong Road, Kowloon Bay, Kowloon, Hong Kong; and 

  

	(4)	 Qin Wu, the sole owner and director of Dawnlight, a natural person with the PRC citizenship, with her
domicile at Apt. 1004, No. 39 2nd Xiaonan Street, Haizhu District, Guangzhou, PRC. 

 (each as a
“Party”, and together, the “Parties”) 
 WHEREAS the Parties entered into a unanimous shareholder agreement dated
July 5th, 2017 (the “Unanimous Shareholder Agreement”). 
 NOW IT IS HEREBY AGREED as follows: 

 

	1.	 This Supplemental Agreement is supplemental to and shall be read as one with the Unanimous Shareholder
Agreement. 

  

	2.	 Capitalized terms used in this Supplemental Agreement without definition shall take the same meanings as
ascribed thereto in the Unanimous Shareholder Agreement. 

  

	3.	 Save to the extent set out in this Supplemental Agreement, the provisions of the Unanimous Shareholder
Agreement continue to apply. 

  

	4.	 The Unanimous Shareholder Agreement is hereby amended by inserting the following paragraph after paragraph F of
the agreements reached by the Parties: 

 “G. This Agreement shall be governed by and interpreted according to the
laws of British Virgin Islands.” 

  
 1 

	5.	 This Supplemental Agreement shall be governed by and interpreted according to the laws of British Virgin
Islands. 

  
 2 

	
	For and on Behalf of
	Fundament Limited

			
	Signature:	 	 /s/ Xu He

		 	Director

  

	
	For and on Behalf of
	Dawnlight Limited

			
	 Signature:
	 	 /s/ Qin Wu

		 	Director

  

			
	Signature:	 	 /s/ Xu He

	Xu He	 	

  

			
	Signature:	 	 /s/ Qin Wu

	Qin WuEX-10.21

 Exhibit 10.21 

INDEMNIFICATION ESCROW AGREEMENT 

This INDEMNIFICATION ESCROW AGREEMENT (this “Agreement”) dated as of
                    , 2018 is entered into by and among Cornerstone Management, Inc. (the “Company”), ViewTrade Securities, Inc.
(the “Underwriter”), and Pearlman Schneider LLP (the “Escrow Agent”). 
 WITNESSETH: 

WHEREAS, the Company is completing a public offering of 5,000,000 ordinary shares of the Company, par value $0.001 (the
“Shares”), and additional amount up to fifteen (15%) percent of the Shares which the Underwriters have the option to purchase from the Company to cover over-allotments, if any, along with any shares under Rule 462 promulgated under
the Securities Act of 1933, at an offering price of $ 4.00 per share (the “Offering”); 
 WHEREAS, the Company and
Underwriter expect that the Offering will close on or before the close of business on                     , 2018 (collectively, the “Closing
Date”); 
 WHEREAS, upon the closing of the Offering the Company has agreed to deposit an aggregate amount of Five Hundred Thousand
Dollars ($500,000) (the “Escrowed Funds”) from the proceeds of the Offering to be received by the Company with the Escrow Agent in a non-interest bearing escrow account, to be held, invested
and disbursed by the Escrow Agent pursuant to the terms and conditions of this Agreement; 
 WHEREAS, the Escrow Agent is willing to hold
the Escrowed Funds and Investment Gain Funds (as such term is defined below in escrow pursuant to and subject to the terms and conditions of this Agreement; and 

NOW, THEREFORE, in consideration of the mutual promises herein contained and intending to be legally bound hereby, the parties hereto hereby
agree as follows: 
  

	1.	 Appointment of Escrow Agent. The Company and the Underwriter hereby appoint the Escrow Agent as escrow
agent in accordance with the terms and subject to the conditions set forth herein and the Escrow Agent hereby accepts such appointment. 

  

	2.	 Delivery of the Escrowed Funds. Upon the closing of the Offering the Escrowed Funds shall be delivered
on behalf of the Company to the Escrow Agent, as escrow agent into a non-interest bearing escrow account maintained by the Escrow Agent (the “Escrow Account”) by wire transfer in accordance
with the wire transfer instructions set forth on Schedule A hereto. In no event shall the aggregate amount of Escrowed Funds delivered to the Escrow Account be less than Five Hundred Thousand Dollars ($500,000). 

 

	3.	 Escrow Agent to Hold and Disburse the Escrowed Funds and Investment Gain Funds. The Escrow Agent will
retain the Escrowed Funds and Investment Gain Funds in an escrow account and disburse the Escrowed Funds and Investment Gain Funds pursuant to the terms of this Agreement, as follows: 

a.    The Escrowed Funds shall be held by the Escrow Agent for the purpose of satisfying the initial
$500,000 of the indemnification obligations of the Company, with respect to the Escrowed Funds, pursuant to Sections 7(l) and 8 of the underwriting agreement
dated                    , 2018 by and between the Company and the Underwriter (the “Underwriting Agreement”), for a period of
twenty four (24) months from the closing of the Offering. Disbursement of such Escrowed Funds and Investment Gain Funds shall be determined by an independent third-party trustee, to be chosen by mutual written consent of the Company and
Underwriter. 

 b.    Notwithstanding the last sentence of the prior
paragraph, in the event that any litigation or proceeding arising out of any matter in connection with the Offering in connection to the Underwriter acting in its capacity as underwriter within twenty four (24) months following the Closing Date
and in which the Company, the Underwriter, the Escrow Agent or the Escrowed Funds becomes the subject of such litigation or proceeding, the Underwriter and the Company hereby authorize the Escrow Agent, at the Underwriter’s sole instruction
upon Underwriter’s written notice to the Escrow Agent if not otherwise so required, to release and deposit the Escrowed Funds with the clerk of the court in which the litigation is pending for the purpose of indemnifying and defending the
Underwriter in such litigation and proceeding, and thereupon the Escrow Agent shall be relieved and discharged of any further responsibility with regard thereto to the extent determined by any such court. The Company and the Underwriter further
hereby authorize the Escrow Agent, if it receives conflicting claims to any of the Escrowed Funds, is threatened with litigation in its capacity as escrow agent under this Agreement, or if the Escrow Agent determines it is necessary to do so for any
other reason relating to this Agreement or the Offering, to interplead all interested parties in any court of competent jurisdiction and to deposit the Escrowed Funds with the clerk of that court and thereupon the Escrow Agent shall be relieved and
discharged of any further responsibility hereunder to the parties from which they were received to the extent determined by such court. 

c.    Upon instruction of the Company, the Escrow Agent may invest the Escrowed Funds during the term of
the Agreement as follows: 
 i.    The Escrowed Funds may be invested in issuers listed on U.S. national
securities exchanges; provided that (1) no investments may be made in the Company’s securities; (2) no more than 20% of the Escrowed Funds may be invested in one issuer; (3) no more than 40% of the Escrowed Funds may be invested
in issuers that have: (A) a market capitalization of less than $1.0 billion; (B) have been public for less than two years; and (C) have less than $1.0 million in average daily volume for last 30 days. 

ii.    In the event the aggregate value of the Escrowed Funds plus the Investment Gain Funds in the Escrow
Account decreases to less than $405,000, 81% of the original amount ($500,000) of Escrowed Funds (the “Minimum Equity”) for more than 20 consecutive trading days, the Company shall promptly (but no later than 10 calendar days
following the 20 consecutive trading days following the decrease of less than 81%) add funds to the Escrow Account to maintain the Minimum Equity. 

iii.    Upon the account reaching Minimum Equity, the Company may not open any additional positions and may
only close investment positions until the account is above the Minimum Equity. 
 iv.    Within thirty
(30) days after the Closing of the Offering, the Escrow Agent shall establish a brokerage account in the Company’s name with a FINRA registered broker-dealer chosen by the Company and reasonably satisfactory to the Underwriter (the
“Escrow Broker”). All proposed transactions will be submitted by the Company in writing to the Underwriter with a confirmation by the Company that such transaction(s) meet the criteria set forth in Sections 3(c)(i)-(iii). The Escrow
Agent shall instruct the Escrow Broker to submit confirmations of all transactions to the Escrow Agent, the Company and the Underwriter. 

v.    All income derived from the investments pursuant to this Section 3(c) in excess of the Escrowed
Funds (“Investment Gain Funds”) may, at the request of the Company, be disbursed to the Company provided in the manner of Section 3(a) of this Agreement, provided that to the extent Investment Gain Funds exceed $50,000 in
excess of the Minimum Equity, the Company shall be permitted to request a disbursement of such excess funds in an amount of no less than $50,000 on March 31, June 30, September 30 or December 31 of any year during the term of
this Agreement prior to the twenty four months period set forth in Section 3(a). 
  

	4.	 Exculpation and Indemnification of Escrow Agent. 

 a.    The Escrow Agent shall have no duties or
responsibilities other than those expressly set forth herein. The Escrow Agent shall have no duty to enforce any obligation of any person to make any payment or delivery, or to direct or cause any payment or delivery to be made other than as set
forth herein, or to enforce any obligation of any person to perform any other act. The Escrow Agent shall be under no liability to the other parties hereto or anyone else, by reason of any failure, on the part of any party hereto or any maker,
guarantor, endorser or other signatory of a document or any other person, to perform such person’s obligations under any such document. Except for amendments to this Agreement referenced below, and except for written instructions given to the
Escrow Agent by the Company and the Underwriter relating to the Escrowed Funds, the Escrow Agent shall not be obligated to recognize any agreement between or among any of the Company and the Underwriter, notwithstanding that references thereto may
be made herein and the Escrow Agent has knowledge thereof. 
 b.    The Escrow Agent shall not be liable
to the Company, the Underwriter, or to anyone else for any action taken or omitted by it, or any action suffered by it to be taken or omitted, in good faith and acting upon any order, notice, demand, certificate, opinion or advice of counsel
(including counsel chosen by the Escrow Agent), statement, instrument, report, or other paper or document (not only as to its due execution and the validity and effectiveness of its provisions, but also as to the truth and acceptability of any
information therein contained), which is reasonably believed by the Escrow Agent to be genuine and to be signed or presented by the proper person or persons. The Escrow Agent shall not be bound by any of the terms thereof, unless evidenced by
written notice delivered to the Escrow Agent signed by the proper party or parties and, if the duties or rights of the Escrow Agent are affected, unless it shall give its prior written consent thereto. 

c.    The Escrow Agent shall not be responsible for the sufficiency or accuracy of the form, or of the
execution, validity, value or genuineness of, any document or property received, held or delivered to it hereunder, or of any signature or endorsement thereon, or for any lack of endorsement thereon, or for any description therein; nor shall the
Escrow Agent be responsible or liable to the Company, the Underwriter, or to anyone else in any respect on account of the identity, authority or rights, of the person executing or delivering or purporting to execute or deliver any document or
property or this Agreement. Except as otherwise set forth herein, the Escrow Agent shall have no responsibility with respect to the use or application of the Escrowed Funds pursuant to the provisions hereof. 

d.    The Escrow Agent shall have the right to assume, in the absence of written notice to the contrary
from the duly authorized representative(s) of the Company and the Underwriter, that a fact or an event, by reason of which an action would or might be taken by the Escrow Agent, does not exist or has not occurred, without incurring liability to the
Company, the Underwriter, or to anyone else for any action taken or omitted to be taken or omitted, in good faith and in the exercise of its own best judgment, in reliance upon such assumption. 

e.    To the extent that the Escrow Agent becomes liable for the payment of taxes, including withholding
taxes, in respect of the Investment Gain Funds, or any payment made hereunder, the Escrow Agent may pay such taxes from the Escrowed Funds; and the Escrow Agent may withhold from any payment of the Escrowed Funds and Investment Gain Funds such
amount as the Escrow Agent estimates to be sufficient to provide for the payment of such taxes not yet paid, and may use the sum withheld for that purpose. In the event that the funds withheld for tax purpose exceeds actual tax payment made, the
Escrow Agent shall deposit the surplus into the Escrow Account upon such payment. The Escrow Agent shall be indemnified and held harmless against any liability for taxes and for any penalties in respect of taxes, on such investment income or
payments in the manner provided in Section 4(f). 

 f.    The Escrow Agent will be indemnified and held
harmless by the Company and Underwriter from and against all expenses, including all counsel fees and disbursements, or loss suffered by the Escrow Agent in connection with any action, suit or proceeding involving any claim, or in connection with
any claim or demand, which in any way, directly or indirectly, arises out of or relates to this Agreement, the services of the Escrow Agent hereunder, except for claims relating to gross negligence or reckless misconduct by the Escrow Agent or
breach of this Agreement by the Escrow Agent, or the monies or other property held by it hereunder. Promptly, but no later than ten (10) business days, after the receipt by the Escrow Agent of notice of any demand or claim or the commencement
of any action, suit or proceeding, the Escrow Agent shall, if a claim in respect thereof is to be made by the Escrow Agent against the Company, notify the Company in writing, but the failure by the Escrow Agent to give such notice shall not relieve
the Company from any liability which the Company may have to the Escrow Agent hereunder, unless the failure of the Escrow Agent to give such notice prejudices or otherwise impairs the Company’s ability to defend any demand, claim, action suit
or proceeding. Notwithstanding any obligation to make payments and deliveries hereunder, the Escrow Agent may retain and hold for such time as it deems necessary such amount of monies or property as it shall, from time to time, reasonably deem
sufficient to indemnify itself for any such loss or expense. 
 g.    For purposes hereof, the term
“expense or loss” shall include all amounts paid or payable to satisfy any claim, demand or liability, or in settlement of any claim, demand, action, suit or proceeding settled with the express written consent of the Escrow Agent, and all
costs and expenses, including, but not limited to, counsel fees and disbursements, paid or incurred in investigating or defending against any such claim, demand, action, suit or proceeding. 

 

	5.	 Indemnification by the Company. The indemnification provisions subject to this Agreement are set forth
in Sections 7(l) and 8 of the Underwriting Agreement dated                , 2018 by and between the Company and the Underwriter, which Sections 7(l) and 8 shall be
deemed to part of this Agreement. 

  

	6.	 Termination of Agreement and Resignation of Escrow Agent. 

a.    This Agreement shall terminate upon disbursement of all of the Escrowed Funds and Investment Gain
Funds provided that the rights of the Escrow Agent and the obligations of the Company and the Underwriter under Section 4 shall survive the termination hereof. 

b.    The Escrow Agent may resign at any time and be discharged from its duties as Escrow Agent hereunder
by giving the Company and the Underwriter at least fifteen (15) business days written notice thereof (the “Notice Period”). As soon as practicable after its resignation, the Escrow Agent shall, if it receives notice from the
Company and the Underwriter within the Notice Period, turn over to a successor escrow agent appointed by the Company and the Underwriter all Escrowed Funds and Investment Gain Funds (less such amount as the Escrow Agent is entitled to continue to
retain and hold in escrow pursuant to Section 4(f) and to retain pursuant to Section 7) upon presentation of the document appointing the new escrow agent and its acceptance thereof. If no new agent is so appointed within the Notice Period,
the Escrow Agent shall return the Escrowed Funds and Investment Gain Funds to the Company without interest or deduction. 
  

	7.	 Form of Payments by Escrow Agent. 

a.    Any payments of the Escrowed Funds by the Escrow Agent pursuant to the terms of this Agreement shall
be made by wire transfer unless directed to be made by check by the Underwriter and/or Company. 

b.    All amounts referred to herein are expressed in United States Dollars and all payments by the Escrow
Agent shall be made in such dollars. 
  

	8.	 Compensation. Escrow Agent shall be entitled to $10,000 as compensation for its services rendered under
this Agreement, which amount shall be delivered by the Company to an account designated by the Escrow Agent on the same date when the Escrowed Funds are delivered into the Escrow Account. 

	9.	 Notices. All notices, demands, consents, requests, instructions and other communications to be given or
delivered or permitted under or by reason of the provisions of this Agreement or in connection with the transactions contemplated hereby shall be in writing and shall be deemed to be delivered and received by the intended recipient as follows:
(i) if personally delivered, on the business day of such delivery (as evidenced by the receipt of the personal delivery service), (ii) if mailed certified or registered mail return receipt requested, on the business day of such delivery (as
evidenced by the signed certified mail card), (iii) if delivered by overnight courier (with all charges having been prepaid), on the business day of such delivery (as evidenced by the receipt of the overnight courier service of recognized standing),
(iv) if delivered by facsimile transmission, on the business day of such delivery if sent by 6:00 p.m. in the time zone of the recipient, or if sent after that time, on the next succeeding business day (as evidenced by the printed confirmation of
delivery generated by the sending party’s telecopier machine), or (v) if delivered by email on the business day of such delivery (as evidenced by delivery confirmation). If any notice, demand, consent, request, instruction or other
communication cannot be delivered because of a changed address of which no notice was given (in accordance with this Section 9), or the refusal to accept same, the notice, demand, consent, request, instruction or other communication shall be
deemed received on the second business day the notice is sent (as evidenced by a sworn affidavit of the sender). All such notices, demands, consents, requests, instructions and other communications will be sent to addresses or facsimile numbers as
applicable set forth hereunder. 

 If to the Company, to: 

Cornerstone Management, Inc. 
 c/o
Guangzhou Cornerstone Asset Management Co., Ltd. 
 49F, Guangzhou CTF Finance Centre 

No. 6 Zhujiang East Road, Zhujiang New Town, Tianhe, Guangzhou 

Guangdong Province, 510032, PRC 

Email: 
 with a copy to: 

Kefei Li, Esq. 
 Sidley Austin LLP

 Suite 608, Tower C2, Oriental Plaza 

No. 1 East Chang An Avenue, Dong Cheng District 

Beijing 100738, People’s Republic of China 

Tel: +86-10-5905-5588 

Email: Kefei.li@sidley.com 

If to the Underwriter, to: 

ViewTrade Securities, Inc. 
 Attn:
Doug K. Aguililla 
 7280 West Palmetto Park Road, Suite 310 

Boca Raton, FL 33433 
 Email:
dougagui@viewtrade.com 
 If to the Escrow Agent, to: 

Pearlman Schneider LLP 
 2200
Corporate Blvd. NW, Suite 210 
 Boca Raton, Florida 33431 

Phone: 561-362-9595 

 

	10.	 Further Assurances. From time to time on and after the date hereof, the Company and the Underwriter
shall deliver or cause to be delivered to the Escrow Agent such further documents and instruments and shall do and cause to be done such further acts as the Escrow Agent shall reasonably request (it being understood that the Escrow Agent shall have
no obligation to make any such request) to carry out more effectively the provisions and purposes of this Agreement, to evidence compliance herewith or to assure itself that it is protected in acting hereunder. 

	11.	 Consent to Service of Process. The Company, the Underwriter and the Escrow Agent hereby irrevocably
consent to the jurisdiction of the Federal and state courts in the Borough of Manhattan in The City of New York (each, a “New York Court”) in connection with any action, suit or proceedings arising out of or relating to this Agreement or
any action taken or omitted hereunder, and waives personal service of any summons, complaint or other process and agrees that the service thereof may be made by certified or registered mail directed to it at the address listed hereto.

  

	12.	 Miscellaneous. 

a.    This Agreement shall be construed without regard to any presumption or other rule requiring
construction against the party causing such instrument to be drafted. The terms “hereby,” “hereof,” “hereunder,” and any similar terms, as used in this Agreement, refer to the Escrow Agreement in its entirety and not
only to the particular portion of this Agreement where the term is used. The word “person” shall mean any natural person, partnership, corporation, government and any other form of business of legal entity. All words or terms used in this
Agreement, regardless of the number or gender in which they were used, shall be deemed to include any other number and any other gender as the context may require. This Agreement shall not be admissible in evidence to construe the provisions of any
prior agreement. 
 b.    This Agreement and the rights and obligations hereunder of the Company and the
Underwriter may not be assigned without the consent of the Escrow Agent, other than by laws of descent or operation of law. This Agreement and the rights and obligations hereunder of the Escrow Agent may be assigned by the Escrow Agent, with the
prior written consent of the Company. This Agreement shall be binding upon and inure to the benefit of each party’s respective successors, heirs and permitted assigns. No other person shall acquire or have any rights under or by virtue of this
Agreement. This Agreement may not be changed orally or modified, amended or supplemented without an express written agreement executed by the Escrow Agent, the Company and the Underwriter, which consent shall not be unreasonably withheld. This
Agreement is intended to be for the sole benefit of the parties hereto and their respective successors, heirs and permitted assigns, and none of the provisions of this Agreement are intended to be, nor shall they be construed to be, for the benefit
of any third person. 
 c.    This Agreement shall be governed by, and construed in accordance with, the
laws of the State of New York. The representations and warranties contained in this Agreement shall survive the execution and delivery hereof and any investigations made by any party. The headings in this Agreement are for purposes of reference only
and shall not limit or otherwise affect any of the terms thereof. 
  

	13.	 Execution of Counterparts. This Agreement may be executed in any number of counterparts, by facsimile or
other form of electronic transmission, each of which shall be deemed to be an original as of those whose signature appears thereon, and all of which shall together constitute one and the same instrument. This Agreement shall become binding when one
or more of the counterparts hereof, individually or taken together, are signed by all parties hereto. 

 [SIGNATURE PAGE TO INDEMNIFICATION ESCROW AGREEMENT] 

IN WITNESS WHEREOF, the parties have executed and delivered this Agreement on the day and year first above written. 

ESCROW AGENT: 
 PEARLMAN SCHNEIDER LLP 

 

			
	By:	 	  

	Name:	 	
	Title:	 	

  

	
	COMPANY:
	
	CORNERSTONE MANAGEMENT, INC.

  

			
	By:	 	  

	Name:	 	
	Title:	 	

  

	
	UNDERWRITER:
	
	VIEWTRADE SECURITIES, INC.

  

			
	By:	 	  

	Name:	 	DOUGLAS K. AGUILILLA
	Title:	 	DIRECTOR, INVESTMENT BANKING

 Schedule A 

ACCOUNT NAME:                TRUST ACCOUNT 

ACCOUNT NO.: 
 ABA ROUTING NO.: 

SWIFT CODE: 
 BANK: 

REFERENCE: 
 ATTN: 

PLEASE WIRE IN U.S. DOLLARS

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