Exhibit 10.6


 





Equity
Pledge Agreement This Equity Pledge Agreement (this "Agreement") has been executed by and among the following parties
on December 19,2018 in Beijing, the People’s Republic of China (“China” or the “PRC”): Party
A: Beijing Qianhaitong Technology Development Co., Ltd. (hereinafter "Pledgee") Address: Room 1209, Floor 12, No.12
Yabao Road, Chaowai, Chaoyang District, Beijing, China Party B: Liu Zhiguang (hereinafter "Pledgor") Address: Room 202,
Unit 2, Block 34, Longjiyuan, Jingjin Highway, Xiazhuzhuang Street, Wuqing District, Tianjin, China Party C: Beijing Ouruixi Medical
Technology Co., Ltd. Address: Room 120808, Unit 2, Floor 7, Building 3, No.1 East Futong Street, Chaoyang District, Beijing, China







     


     


    

 





In
this Agreement, each of Pledgee, Pledgor and Party C shall be referred to as a "Party" respectively, and they shall
be collectively referred to as the "Parties". Whereas: 1.Pledgor
is a citizen of China, and holds 2% of the equity interest in Party C in record. Party C is a limited liability company registered
in Beijing, China. Party C acknowledges the respective rights and obligations of Pledgor and Pledgee under this Agreement, and
intends to provide any necessary assistance in registering the Pledge; 2.Pledgee is a wholly foreign-owned enterprise registered
in China. Pledgee, Pledgor and Party C owned by Pledgor have executed an Technical Consultation and Service Agreement and other
control agreements (the “Control Agreements”); 3.To ensure that Pledgor and Party C fully perform their obligations
under the Control Agreements, and pay the consulting and service fees thereunder to the Pledgee when the sum becomes due, Pledgor
hereby pledges to the Pledgee all of the equity interest he holds in Party C as security for payment of the consulting and service
fees by Party C under the Control Agreements. To perform the provisions of the Control Agreements, the Parties have mutually agreed
to execute this Agreement upon the following terms. DEFINITIONS Unless otherwise provided herein, the terms below shall have the
following meanings: 


 



     


     


    

 





 1.1Pledge: shall
refer to the security interest granted by Pledgor to Pledgee pursuant to Section 2 of this Agreement, i.e., the right of Pledgee
to be compensated on a preferential basis with the conversion, auction or sales price of the Equity Interest. 1.2 Equity Interest:
shall refer to all of the equity interest lawfully now held and hereafter acquired by Pledgor in Party C. 1.3 Term of Pledge:
shall refer to the term set forth in Section 3 of this Agreement. 1.4 Control Agreements: shall refer to Technical Consultation
and Service Agreements, and other relevant control agreements executed by and among Pledgor, Party C and Pledgee on December
19, 2018. 1.5 Event of Default: shall refer to any of the circumstances set forth in Section 7 of this Agreement. 1.6 Notice of
Default: shall refer to the notice issued by Pledgee in accordance with this Agreement declaring an Event of Default. As collateral
security for the performance of the Control Agreements and the timely and complete payment when due (whether at stated maturity,
by acceleration or otherwise) of any or all of the payments due by Party C and/or Pledgor, including without limitation the consulting
and services 


 



     


     


    

 





fees payable to the
Pledgee under the Control Agreements, Pledgor hereby pledges to Pledgee a first security interest in all of Pledgor's right, title
and interest, whether now owned or hereafter acquired by Pledgor, in the Equity Interest of Party C. TERM OF PLEDGE 3.1 The Pledge
shall become effective on such date when the pledge of the Equity Interest contemplated herein has been registered with relevant
administration for industry and commerce (the “AIC”). The Pledge shall be continuously valid until the Pledgor is
no longer a shareholder of Party C or the satisfaction
of all its obligations by the Party C under the Control Agreements. The Pledgors shall be responsible for recording of this Agreement
in the Company’s Register of Shareholders. 3.2 During the Term of Pledge, in the event Party C fails to pay the exclusive
consulting or service fees in accordance with the Control Agreements, Pledgee shall have the right, but not the obligation, to
dispose of the Pledge in accordance with the provisions of this Agreement. CUSTODY OF RECORDS FOR EQUITY INTEREST SUBJECT TO PLEDGE
4.1 During the Term of Pledge set forth in this Agreement, Pledgor shall deliver to Pledgee's custody the shareholders' register
containing the Pledge within one week from the execution of this Agreement. Pledgee shall have custody of such items during the
entire Term of Pledge set forth in this Agreement. 4.2 Pledgee shall have the right to collect dividends generated by the Equity
Interest during the Term of Pledge. 


 



     


     


    

 





REPRESENTATIONS
AND WARRANTIES OF PLEDGOR 5.1 Pledgor is the owner
of the Equity Interest in record of register of shareholder. 5.2 Pledgee shall have the right to dispose of and transfer the Equity
Interest in accordance with the provisions set forth in this Agreement. 5.3 Except for the Pledge, Pledgor has not placed any
security interest or other encumbrance on the Equity Interest. COVENANTS AND FURTHER AGREEMENTS OF PLEDGOR 6.1 Pledgor hereby
covenants to the Pledgee, that during the term of this Agreement, Pledgor shall: 1 not transfer the Equity Interest, place or
permit the existence of any security interest or other encumbrance on the Equity Interest, without the prior written consent of
Pledgee, except for the performance of the Equity Option Agreement (the “Equity Option Agreement”) executed by Pledgor,
the Pledgee and Party C on the execution date of this Agreement; 2 comply with the provisions of all laws and regulations applicable
to the pledge of rights, and within five (5) working days of receipt of any notice, order or recommendation issued or 


 



     


     


    

 





prepared
by relevant competent authorities regarding the Pledge, shall present the aforementioned notice, order or recommendation to Pledgee,
and shall comply with the aforementioned notice, order or recommendation or submit objections and representations with respect
to the aforementioned matters upon Pledgee's reasonable request or upon consent of Pledgee; 3 promptly notify Pledgee of any event
or notice received by Pledgor that may have an impact on Pledgee's rights to the Equity Interest or any portion thereof, as well
as any event or notice received by Pledgor that may have an impact on any guarantees and other obligations of Pledgor arising
out of this Agreement. 6.2 Pledgor agrees that the rights acquired by Pledgee in accordance with this Agreement with respect to
the Pledge shall not be interrupted or harmed by Pledgor or any heirs or representatives of Pledgor or any other persons through
any legal proceedings. 6.3 To protect or perfect the security interest granted by this Agreement for payment of the consulting
and service fees under the Control Agreements, Pledgor hereby undertakes to execute in good faith and to cause other parties who
have an interest in the Pledge to execute all certificates, agreements, deeds and/or covenants required by Pledgee. Pledgor also
undertakes to perform and to cause other parties who have an interest in the Pledge to perform actions required by Pledgee, to
facilitate the exercise by Pledgee of its rights and authority granted thereto by this Agreement, and to enter into all relevant
documents regarding ownership of Equity Interest with Pledgee or designee(s) of Pledgee (natural persons/legal persons). Pledgor
undertakes to provide Pledgee within a reasonable time with all notices, orders and decisions regarding the Pledge that are required
by Pledgee.


 



     


     


    

 





6.4
Pledgor hereby undertakes to comply with and perform all guarantees, promises, agreements, representations and conditions under
this Agreement. In the event of failure or partial performance of its guarantees, promises, agreements, representations and conditions,
Pledgor shall indemnify Pledgee for all losses resulting therefrom. 6.5 The Pledgors shall process the registration procedures
with the Administration for Industry and Commerce concerning the Pledge as soon as practical after the execution of this Agreement.
6.6 Without notifying Pledgee in advance and obtaining Pledgee’s prior written consent, Pledgor shall not transfer the Equity
Interest and any action for the proposed transfer of the Equity Interest of Pledgor shall be invalid. Any payment received by
Pledgor for transfer of the Equity Interest shall be firstly used to repay the secured obligations to Pledgee or be placed in
escrow with a third party as agreed with Pledgee. EVENT OF BREACH 7.1 The following circumstances shall be deemed Event of Default:
1 Party C fails to fully and timely fulfill any liabilities under the Control Agreements, including without limitation failure
to pay in full any of the consulting and service fees payable under the Control Agreements or breaches any other obligations of
Party C thereunder; 2 Pledgor or Party C has committed a material breach of any


 



     


     


    

 





provisions
of this Agreement; 3 Except for the performance of the Equity Option Agreement, Pledgor transfers or purports to transfer or abandons
the Equity Interest pledged or assigns the Equity Interest pledged without the written consent of Pledgee; and 4 The successor
or custodian of Party C is capable of only partially performing or refusing to perform the payment obligations under the Control
Agreements. 5 The occurrence of any adverse change to the assets or property of the Pledgor, which in Pledgee’s determination,
may impact the ability of the Pledgor to perform its obligations hereunder. 6 The occurrence of any other circumstances under
which the Pledgee is not or may not able to exercise its rights hereunder in accordance with the applicable law. 7.2 Upon notice
or discovery of the occurrence of any circumstances or event that may lead to the aforementioned circumstances described in Section
7.1, Pledgor shall immediately notify Pledgee in writing accordingly. 7.3 Unless an Event of Default set forth in this Section
7.1 has been successfully resolved to Pledgee's satisfaction within twenty (20) days after the Pledgee delivers a notice to the
Pledgor requesting ratification of such Event of Default, Pledgee may issue a Notice of Default to Pledgor in writing at any time
thereafter, demanding to immediately dispose of the Pledge in accordance with the provisions of Section 8 of this Agreement.


 



     


     


    

 





EXERCISE
OF PLEDGE 8.1 Prior to the full payment of the consulting
and service fees described in the Control Agreements, without the Pledgee's written consent, Pledgor shall not assign the Equity
Interest in Party C. 8.2 Pledgee may issue a written notice to Pledgor when exercising the Pledge. 8.3 Subject to the provisions
of Section 7.3, Pledgee may exercise the right to enforce the Pledge at any time after the issuance of the Notice of Default in
accordance with Section 7.3. Once Pledgee elects to enforce the Pledge, Pledgor shall cease to be entitled to any rights or interests
associated with the Equity Interest. 8.4 In the event of default, Pledgee is entitled to dispose of the Equity Interest in accordance
with applicable PRC laws. Only to the extent permitted under applicable PRC laws, Pledgee has no obligation to account to Pledgor
for proceeds of disposition of the Equity Interest, and Pledgor hereby waives any rights it may have to demand any such accounting
from Pledgee. 8.5 When Pledgee disposes of the Pledge in accordance with this Agreement, Pledgor and Party C shall provide necessary
assistance to enable Pledgee to enforce the Pledge in accordance with this Agreement. ASSIGNMENT 


 



     


     


    

 





9.1
Without Pledgee's prior written consent, Pledgor shall not have the right to assign or delegate its rights and obligations under
this Agreement. 9.2 This Agreement shall be binding on Pledgor and its successors and permitted assigns, and shall be valid with
respect to Pledgee and each of its successors and assigns. 9.3 At any time, Pledgee may assign any and all of its rights and obligations
under the Control Agreements to its designee(s) (natural/legal persons), in which case the assigns shall have the rights and obligations
of Pledgee under this Agreement, as if it were the original party to this Agreement. When the Pledgee assigns the rights and obligations
under the Control Agreements, upon Pledgee's request, Pledgor shall execute relevant agreements or other documents relating to
such assignment. 9.4 In the event of a change in Pledgee due to an assignment, Pledgor shall, at the request of Pledgee, execute
a new pledge agreement with the new pledgee on the same terms and conditions as this Agreement, and register the same with the
relevant AIC. 9.5 Pledgor shall strictly abide by the provisions of this Agreement and other contracts jointly or separately executed
by the Parties hereto or any of them, including the Equity Option Agreement and the Power of Attorney granted to Pledgee, perform
the obligations hereunder and thereunder, and refrain from any action/omission that may affect the effectiveness and enforceability
thereof. Any remaining rights of Pledgor with respect to the Equity Interest pledged hereunder shall not be exercised by Pledgor
except in accordance with the written instructions of Pledgee.


 



     


     


    

 





TERMINATION
Upon the full payment of the consulting and service
fees under the Control Agreements and upon termination of Party C's obligations under the Control Agreements, this Agreement shall
be terminated, and Pledgee shall then terminate the equity pledge under this Agreement as soon as reasonably practicable. HANDLING
FEES AND OTHER EXPENSES All fees and out of pocket expenses relating to this Agreement, including but not limited to legal costs,
costs of production, stamp tax and any other taxes and fees, shall be borne by Party C. CONFIDENTIALITY The Parties acknowledge
that the existence and the terms of this Agreement and any oral or written information exchanged between the Parties in connection
with the preparation and performance this Agreement are regarded as confidential information. Each Party shall maintain confidentiality
of all such confidential information, and without obtaining the written consent of the other Party, it shall not disclose any
relevant confidential information to any third parties, except for the information that: (a) is or will be in the public domain
(other than through the receiving Party’s unauthorized disclosure); (b) is under the obligation to be disclosed pursuant
to the applicable laws or regulations, rules of any 


 



     


     


    

 





 stock
exchange, or orders of the court or other government authorities; or (c) is required to be disclosed by any Party to its shareholders,
investors, legal counsels or financial advisors regarding the transaction contemplated hereunder, provided that such shareholders,
investors, legal counsels or financial advisors shall be bound by the confidentiality obligations similar to those set forth in
this Section. Disclosure of any confidential information by the staff members or agencies hired by any Party shall be deemed disclosure
of such confidential information by such Party, which Party shall be held liable for breach of this Agreement. This Section shall
survive the termination of this Agreement for any reason. GOVERNING LAW AND RESOLUTION OF DISPUTES 13.1 The execution, effectiveness,
construction, performance, amendment and termination of this Agreement and the resolution of disputes hereunder shall be governed
by the laws of China. 13.2 In the event of any dispute with respect to the construction and performance of 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 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 Beijing Commission
for arbitration, in accordance with its Arbitration Rules. The arbitration shall be conducted in Beijing, and the language used
in arbitration shall be Chinese. The arbitration award shall be final and binding on all Parties. 13.3 Upon the occurrence of
any disputes arising from the construction and performance of this Agreement or during the pending arbitration of any dispute,
except for the matters under dispute, the Parties to this Agreement shall continue to exercise their respective rights under this
Agreement and perform their respective obligations under this Agreement.


 



     


     


    

 





NOTICES
14.1 All notices and other communications required
or permitted to be given pursuant to this Agreement shall be delivered personally or sent by registered mail, postage prepaid,
by a commercial courier service to the address of such party set forth below. A confirmation copy of each notice shall also be
sent by E-mail. The dates on which notices shall be deemed to have been effectively given shall be determined as follows: Notices
given by personal delivery, by courier service or by registered mail, postage prepaid, shall be deemed effectively given on the
date of acceptance or refusal at the address specified for notices. 14.2 For the purpose of notices, the addresses of the Parties
are as follows: Party A: Beijing Qianhaitong Technology Development Co., Ltd. Address: Room 1209, Floor 12, No.12 Yabao Road,
Chaowai, Chaoyang District, Beijing, China Phone: 010-6478-8692 Party B: Liu Zhiguang


 



     


     


    

 





Address:
Room 202, Unit 2, Block 34, Longjiyuan, Jingjin Highway,
Xiazhuzhuang Street, Wuqing District, Tianjin, China Attn: Liu Zhiguang Phone: 13801153626 Party C: Beijing
Ouruixi Medical Technology Co., Ltd. Address: Room 120808, Unit 2, Floor 7, Building 3, No.1 East Futong Street, Chaoyang District,
Beijing, China Attn: Shi Baoning Phone: 010-6478-8692 14.3 If any Party change its address for notices or its contact
person, a notice shall be delivered to the other Parties in accordance with the terms hereof. SEVERABILITY In the event that 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 strive 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. ATTACHMENTS The attachments set forth herein shall be an integral part of this Agreement.
EFFECTIVENESS 17.1 This Agreement shall become effective when the Parties have duly executed this Agreement and Party A and Party
C stamp the paging seal. 17.2 Any amendments, changes and supplements to this Agreement shall be in writing and shall become effective
after the affixation of the signatures or seals of the Parties. 17.3 This Agreement is written in Chinese and English in three
(3) copies. Pledgor, Pledgee and Party C shall hold one (1) copy respectively. Each copy of this Agreement shall have equal validity.
In case there is any conflict between the Chinese version and the English version, the Chinese version shall prevail. [The Remainder
of this page is intentionally left blank]


 



     


     


    

 





 [Signature Page]
IN WITNESS WHEREOF, the Parties have caused their authorized representatives to execute this Equity Pledge Agreement as of the
date first above written. Party A: Beijing Qianhaitong Technology Development Co., Ltd. (Seal) Name: SHI Baoning Title: Legal
Representative By:


 



     


     


    

 





[Signature Page] IN
WITNESS WHEREOF, the Parties have caused their authorized representatives to execute this Equity Pledge Agreement as of the date
first above written. Party B: LIU Zhiguang By:


 



     


     


    

 





[Signature Page] IN
WITNESS WHEREOF, the Parties have caused their authorized representatives to execute this Equity Pledge Agreement as of the date
first above written. Party C: Beijing Ouruixi Medical Technology Co., Ltd. (Seal) Name: SHI Baoning Title: Legal Representative
By:


 



     


     


    

 





 Attachments:
1. Shareholders' register of Beijing Ouruixi Medical Technology Co., Ltd. 2. Technical Consultation and Service Agreement