Document:

EX-10.17

 Exhibit 10.17 

Power of Attorney 
 I,
Yueqin Zhao, a Chinese citizen with Chinese Identification Card No.410123194808276929, and a holder of 3% of the entire registered capital in Guangzhou Cornerstone Capital Management Co., Ltd., (the “Cornerstone Capital”) (the
“My Shareholding”), hereby irrevocably authorize Guangzhou Cornerstone Corporate Consulting Co., Ltd. (the “WFOE”) to exercise the following rights relating to My Shareholding during the term of this Power of
Attorney: 
 The WFOE is hereby authorized to act on behalf of myself as my exclusive agent and attorney with respect to all matters
concerning My Shareholding, including without limitation to: 1) attend shareholders’ meetings of Cornerstone Capital; 2) exercise all the shareholder’s rights and shareholder’s voting rights I am entitled to under the laws of China
and Cornerstone Capital’s Articles of Association, including but not limited to the sale or transfer or pledge or disposition of My Shareholding in part or in whole; and 3) designate and appoint on behalf of myself the legal representative, the
executive director and/or director, supervisor, the chief executive officer and other senior management members of Cornerstone Capital. 

Without limiting the generality of the powers granted hereunder, the WFOE shall have the power and authority under this Power of Attorney to
execute the Transfer Contracts stipulated in Exclusive Option Agreement, to which I am required to be a party, on behalf of myself, and to effect the terms of the Share Pledge Agreement and Exclusive Option Agreement, both dated the date hereof, to
which I am a party. 
 All the actions associated with My Shareholding conducted by the WFOE shall be deemed as my own actions, and all the
documents related to My Shareholding executed by the WFOE shall be deemed to be executed by me. I hereby acknowledge and ratify those actions and/or documents by the WFOE. 

The WFOE is entitled to re-authorize or assign its rights related to the aforesaid matters to any
other person or entity at its own discretion and without giving prior notice to me or obtaining my consent. 
 This Power of Attorney is
coupled with an interest and shall be irrevocable and continuously valid from the date of execution of this Power of Attorney, so long as I am a shareholder of Cornerstone Capital. 

During the term of this Power of Attorney, I hereby waive all the rights associated with My Shareholding, which have been authorized to WFOE
through this Power of Attorney, and shall not exercise such rights by myself. 
 This Power of Attorney is written in Chinese and English;
in case there is any conflict between the Chinese version and the English version, the Chinese version shall prevail. 

  
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Strictly Confidential 

 
			
	Yueqin Zhao
		
	By:	 	 /s/ Yueqin Zhao

	Date:	 	October 12, 2017

  

			
	Mingqi Huang
		
	Witness:	 	 /s/ Mingqi Huang

			
	Date:	 	October 12, 2017

  
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Strictly ConfidentialEX-10.18

 Exhibit 10.18 

Power of Attorney 
 I,
Meifang Liu, a Chinese citizen with Chinese Identification Card No.440105195704103043, and a holder of 2% of the entire registered capital in Guangzhou Cornerstone Capital Management Co., Ltd., (the “Cornerstone Capital”) (the
“My Shareholding”), hereby irrevocably authorize Guangzhou Cornerstone Corporate Consulting Co., Ltd. (the “WFOE”) to exercise the following rights relating to My Shareholding during the term of this Power of
Attorney: 
 The WFOE is hereby authorized to act on behalf of myself as my exclusive agent and attorney with respect to all matters
concerning My Shareholding, including without limitation to: 1) attend shareholders’ meetings of Cornerstone Capital; 2) exercise all the shareholder’s rights and shareholder’s voting rights I am entitled to under the laws of China
and Cornerstone Capital’s Articles of Association, including but not limited to the sale or transfer or pledge or disposition of My Shareholding in part or in whole; and 3) designate and appoint on behalf of myself the legal representative, the
executive director and/or director, supervisor, the chief executive officer and other senior management members of Cornerstone Capital. 

Without limiting the generality of the powers granted hereunder, the WFOE shall have the power and authority under this Power of Attorney to
execute the Transfer Contracts stipulated in Exclusive Option Agreement, to which I am required to be a party, on behalf of myself, and to effect the terms of the Share Pledge Agreement and Exclusive Option Agreement, both dated the date hereof, to
which I am a party. 
 All the actions associated with My Shareholding conducted by the WFOE shall be deemed as my own actions, and all the
documents related to My Shareholding executed by the WFOE shall be deemed to be executed by me. I hereby acknowledge and ratify those actions and/or documents by the WFOE. 

The WFOE is entitled to re-authorize or assign its rights related to the aforesaid matters to any
other person or entity at its own discretion and without giving prior notice to me or obtaining my consent. 
 This Power of Attorney is
coupled with an interest and shall be irrevocable and continuously valid from the date of execution of this Power of Attorney, so long as I am a shareholder of Cornerstone Capital. 

During the term of this Power of Attorney, I hereby waive all the rights associated with My Shareholding, which have been authorized to WFOE
through this Power of Attorney, and shall not exercise such rights by myself. 
 This Power of Attorney is written in Chinese and English;
in case there is any conflict between the Chinese version and the English version, the Chinese version shall prevail. 

  
 1 

Strictly Confidential 

 
			
	Meifang Liu
		
	By:	 	 /s/ Meifang Liu

		
	Date:	 	October 12, 2017

  

			
	Mingqi Huang
		
	Witness:	 	 /s/ Mingqi Huang

		
	Date:	 	October 12, 2017

  
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Strictly ConfidentialEX-10.19

 Exhibit 10.19 

Unanimous Shareholder Agreement 

of 
 Cornerstone
Management, Inc. 
 This Unanimous Shareholder Agreement (the “Agreement”) is made and entered into by and among the
following Parties as of July 5th, 2017 in Guangzhou, People’s Republic of China (the “PRC”): 
 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; 

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; 
 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, 
 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, 

 

	A.	Cornerstone Management, Inc. (the “Company”), is a company incorporated in British Virgin Islands in accordance with the law thereof with the domicile at Vistra Corporate Services Centre, Wickhams Cay
II, Road Town, Tortola, VG1110, British Virgin Islands. 

  

	B.	Fundament is a shareholder of the Company, holding 37.50% of the equity interests in the Company. 

  
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	C.	Dawnlight is a shareholder of the Company, holding 37.50% equity interests in the Company. 

  

	D.	Together, Fundament and Dawnlight hold 75% equity interests in the Company. 

  

	E.	Fundament and Dawnlight wish to make arrangements regarding certain aspects of the organizations of the affairs of Cornerstone and their respective rights and obligations to Cornerstone and each other.

  

	F.	Xu He and Qin Wu, as sole owners of Fundament and Dawnlight, respectively, have the right to enter into this Agreement for and on behalf of Fundament and Dawnlight. 

NOW THEREFORE in consideration of the mutual covenants and agreements contained in this Agreement, the Parties agree with each as follows: 

 

	A.	Parties shall take actions with unanimous consent to handle with issues about the operation and development of Cornerstone and to make resolutions of the shareholder meeting thereof in accordance with laws and
regulations, and the articles of association of Cornerstone. 

  

	B.	Parties shall take actions with unanimous consent to exercise proposal rights or vote on the shareholder meeting or the board of directors of Cornerstone for major issues of the operation development thereof;

  

	C.	Within the term of this Agreement, the Parties shall consult and reach agreement for relevant proposal or vote before any Party plans to vote or submit proposal to the shareholder meeting or the meeting of the board of
directors of Cornerstone for major issues of the operation development thereof; in case of any disagreements between the Parties, Xu He’s decision and/or opinion shall prevail. 

 

	D.	Within the term of this Agreement, the Parties shall promise to exercise the voting rights on the shareholder meeting of Cornerstone in accordance with prior agreement reached by the Parties except the vote avoidance
situation caused by related transactions. The Parties may attend the shareholder meeting hereof in person, or may entrust other Parties hereof to attend and vote on the shareholder meeting hereof; 

 

	E.	Parties shall exercise rights in complying with relevant laws and regulation, and the terms and conditions hereof, and its own promises. 

  
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	F.	This Agreement shall come into force as of the date first stated hereof, and the Agreement shall be permanent provided that Xu He terminates the Agreement. For the avoidance of disputes, Parties hereof confirm that Xu
HE is the sole party with the right to terminate this Agreement. 

 IN WITNESS WHEREOF the Parties have executed this Agreement as of
the date first above stated 
  

			
	For and on Behalf of
	
	Fundament Limited
		
	Signature:	 	 /s/ Xu He

	Xu He
	
	For and on Behalf of
	
	Dawnlight Limited
		
	Signature:	 	 /s/ Qin Wu

	Qin Wu

  
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