Document:

Exhibit 4.22

 

Consent Letter

 

(English Translation)

 

I, Liu Wenjie (Identity Card number: ),
the legal spouse of Wen Wei, hereby unconditionally and irrevocably agree that Wen Wei executes the following documents (hereinafter referred
to as the “Transaction Documents”) on June 24, 2018, and that the equity of Tansuo Jixian Technology (Beijing)
Co., Ltd. (hereinafter referred to as “Tansuo Jixian”) held by and registered under the name of Wen Wei will be
disposed of in accordance with the provisions of the following Transaction Documents:

 

(i)   The Equity Pledge Agreement executed
by and among Chema Technology (Beijing) Co., Ltd. (hereinafter referred to as the “WFOE”), Tansuo Jixian and all
shareholders thereof; and

 

(ii)  the Exclusive Call Option Agreement
executed by and among the WFOE, Tansuo Jixian and all shareholders thereof;

 

(iii) the Power of Attorney.

 

I acknowledge that I do not enjoy any interest
to the equity of Tansuo Jixian, and undertake that I will not file any claim in respect of the equity of Tansuo Jixian. I further acknowledge
that no additional authorization or consent by me is required for the performance and further modification or termination of the Transaction
Documents by Wen Wei.

 

I undertake that I will execute all necessary
documents and take all necessary actions to ensure the proper performance of the Transaction Documents (as amended from time to time).

 

I agree and undertake that if for any reason I
obtain any equity of Tansuo Jixian, I shall be bound by the Transaction Documents (as amended from time to time) and comply with
the obligations thereunder as a shareholder of Tansuo Jixian and, for that purpose, once requested by the WFOE, execute a series of written
documents, the format and content of which are basically the same with that of the Transaction Documents (as amended from time to time).

 

I further acknowledge, undertake and warrant that,
under any circumstances, including but not limited to my divorce with my spouse, my spouse has the right to independently dispose of the
equity of domestic-funded enterprises held by him and the corresponding assets, and I will not take any action which may affect or interfere
with the performance by my spouse of his obligations under the Transaction Documents.

 

     

     

    

 

The conclusion, validity, interpretation, performance,
modification and termination hereof and the settlement of disputes arising from this Consent Letter shall all be governed by the Chinese
laws. Any dispute arising from the interpretation and performance hereof shall first of all be settled by the signatories hereto through
friendly negotiation. Where the dispute is still not settled within thirty (30) days upon written notification by a Party to the other
Parties requesting for the settlement of the dispute through negotiation, any Party may submit the dispute to China International Economic
and Trade Arbitration Commission for settlement in accordance with its arbitration rules. The arbitration shall be held in Beijing, and
the language of the arbitration shall be Chinese. The arbitration award shall be final and binding upon the Parties.

 

	 	Signature: 	/s/ Liu
    Wenjie
	 	 
	 	Name:    Liu Wenjie
	 	 
	 	June 23, 2018

 

     

     

    

 

Consent Letter

 

(English Translation)

 

I, Zhang Xiaohong (Identity Card number:
), the legal spouse of Sun Jianchen, hereby unconditionally and irrevocably agree that Sun Jianchen executes the following documents (hereinafter
referred to as the “Transaction Documents”) on June 24, 2018, and that the equity of Tansuo Jixian Technology
(Beijing) Co., Ltd. (hereinafter referred to as “Tansuo Jixian”) held by and registered under the name of Sun
Jianchen will be disposed of in accordance with the provisions of the following Transaction Documents:

 

(i)   The Equity Pledge Agreement executed
by and among Chema Technology (Beijing) Co., Ltd. (hereinafter referred to as the “WFOE”), Tansuo Jixian and all
shareholders thereof; and

 

(ii)  the Exclusive Call Option Agreement
executed by and among the WFOE, Tansuo Jixian and all shareholders thereof;

 

(iii) the Power of Attorney.

 

I acknowledge that I do not enjoy any interest
to the equity of Tansuo Jixian, and undertake that I will not file any claim in respect of the equity of Tansuo Jixian. I further acknowledge
that no additional authorization or consent by me is required for the performance and further modification or termination of the Transaction
Documents by Sun Jianchen.

 

I undertake that I will execute all necessary
documents and take all necessary actions to ensure the proper performance of the Transaction Documents (as amended from time to time).

 

I agree and undertake that if for any reason I
obtain any equity of Tansuo Jixian, I shall be bound by the Transaction Documents (as amended from time to time) and comply with
the obligations thereunder as a shareholder of Tansuo Jixian and, for that purpose, once requested by the WFOE, execute a series of written
documents, the format and content of which are basically the same with that of the Transaction Documents (as amended from time to time).

 

I further acknowledge, undertake and warrant that,
under any circumstances, including but not limited to my divorce with my spouse, my spouse has the right to independently dispose of the
equity of domestic-funded enterprises held by him and the corresponding assets, and I will not take any action which may affect or interfere
with the performance by my spouse of his obligations under the Transaction Documents.

 

     

     

    

 

The conclusion, validity, interpretation, performance,
modification and termination hereof and the settlement of disputes arising from this Consent Letter shall all be governed by the Chinese
laws. Any dispute arising from the interpretation and performance hereof shall first of all be settled by the signatories hereto through
friendly negotiation. Where the dispute is still not settled within thirty (30) days upon written notification by a Party to the other
Parties requesting for the settlement of the dispute through negotiation, any Party may submit the dispute to China International Economic
and Trade Arbitration Commission for settlement in accordance with its arbitration rules. The arbitration shall be held in Beijing, and
the language of the arbitration shall be Chinese. The arbitration award shall be final and binding upon the Parties.

 

	 	Signature: 	/s/ Zhang
    Xiaohong
	 	 
	 	Name:   Zhang Xiaohong
	 	 
	 	June 23, 2018Exhibit 4.23

 

Consent Letter

 

(English Translation)

 

I, Xu Li  (Identity Card number: ), the
legal spouse of Cheng Congwu, hereby unconditionally and irrevocably agree that Cheng Congwu executes the following documents (hereinafter
referred to as the “Transaction Documents”) on June 24, 2018, and that the equity of Tansuo Jixian Technology
(Beijing) Co., Ltd. (hereinafter referred to as “Tansuo Jixian”) held by and registered under the name of Cheng
Congwu will be disposed of in accordance with the provisions of the following Transaction Documents:

 

(i)   The Equity Pledge Agreement executed
by and among Chema Technology (Beijing) Co., Ltd. (hereinafter referred to as the “WFOE”), Tansuo Jixian and all
shareholders thereof; and

 

(ii)  the Exclusive Call Option Agreement
executed by and among the WFOE, Tansuo Jixian and all shareholders thereof;

 

(iii) the Power of Attorney.

 

I acknowledge that I do not enjoy any interest
to the equity of Tansuo Jixian, and undertake that I will not file any claim in respect of the equity of Tansuo Jixian. I further acknowledge
that no additional authorization or consent by me is required for the performance and further modification or termination of the Transaction
Documents by Cheng Congwu.

 

I undertake that I will execute all necessary
documents and take all necessary actions to ensure the proper performance of the Transaction Documents (as amended from time to time).

 

I agree and undertake that if for any reason I
obtain any equity of Tansuo Jixian, I shall be bound by the Transaction Documents (as amended from time to time) and comply with
the obligations thereunder as a shareholder of Tansuo Jixian and, for that purpose, once requested by the WFOE, execute a series of written
documents, the format and content of which are basically the same with that of the Transaction Documents (as amended from time to time).

 

I further acknowledge, undertake and warrant that,
under any circumstances, including but not limited to my divorce with my spouse, my spouse has the right to independently dispose of the
equity of domestic-funded enterprises held by him and the corresponding assets, and I will not take any action which may affect or interfere
with the performance by my spouse of his obligations under the Transaction Documents.

 

The conclusion, validity, interpretation, performance,
modification and termination hereof and the settlement of disputes arising from this Consent Letter shall all be governed by the Chinese
laws. Any dispute arising from the interpretation and performance hereof shall first of all be settled by the signatories hereto through
friendly negotiation. Where the dispute is still not settled within thirty (30) days upon written notification by a Party to the other
Parties requesting for the settlement of the dispute through negotiation, any Party may submit the dispute to China International Economic
and Trade Arbitration Commission for settlement in accordance with its arbitration rules. The arbitration shall be held in Beijing, and
the language of the arbitration shall be Chinese. The arbitration award shall be final and binding upon the Parties.

 

     

     

    

 

	 	Signature: 	/s/ Xu Li
	 	 
	 	Name:   Xu Li
	 	 
	 	June 24, 2018

 

    -2-

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