Document:

EX-10.4

 Exhibit 10.4 

Power of Attorney 
 I,
Ying Wang, citizen of the People’s Republic of China (the “PRC”) with the identification number of ***, is the shareholder of Shanghai Yibo Medical Devices Co., Ltd. (“Shanghai Yibo”) who holds 50% of
the equity interest of Shanghai Yibo (“My Equity Interest”). Regarding My Equity Interest, I hereby unconditionally and irrevocably authorize Shanghai ECMOHO Health Biotechnology Co, Ltd. (hereinafter referred to as the
“Representative”) as my representative and to exercise the following rights during the term of this Power of Attorney: 

As my only and exclusive representative, the Representative is entitled to exercise the following rights of My Equity Interest in my name and
on my behalf: (1) to attend the shareholders’ meeting of Shanghai Yibo and sign relevant shareholders resolutions on my behalf; (2) to exercise all my shareholder rights according to the laws and the articles of association of
Shanghai Yibo, including without limitation to shareholder’s voting right and the rights to sell, assign, pledge or dispose of all or part of My Equity Interest; and (3) as my representative, to designate and vote for the legal
representative, board chairman, director of board, supervisor, general manager and other senior management. 
 Within the scope of
authorization, the Representative is entitled to, on my behalf, execute the transfer agreement as provided in the Exclusive Call Option Agreement (to which I shall be a party), and perform the obligations under the Equity Interest Pledge Agreement
and the Exclusive Call Option Agreement to which I am a party dated as of the date hereof. The exercise of such right shall not place any restrictions to this Power of Attorney. 

Except as otherwise provided in this Power of Attorney, the Representative is entitled to assign, use or dispose of the cash dividends and
other non-cash income incurred from My Equity Interest in other ways in accordance with my written or oral instructions. 

 Except as otherwise provided in this Power of Attorney, all the actions of the
Representative regarding My Equity Interest may be made in its own discretion without any of my written or oral instructions. 
 All the
actions of the Representative regarding My Equity Interest shall be deemed to be actions of myself, and all the documents executed by the Representative shall be deemed to be executed by myself. I will acknowledge all such actions and documents.

 The Representative has the right to sub-authorize other qualified representative to perform the
above-mentioned matters and to exercise the right of My Equity Interest without notifying me in advance or obtaining my approval. 
 This
Power of Attorney shall become effective from the date of its execution and shall remain effective and irrevocable as long as I am a shareholder of Shanghai Yibo. 

During the term of this Power of Attorney, I hereby waive all the rights authorized to the Representative related to My Equity Interest
according to this Power of Attorney and will not exercise such rights by myself. 
 Signature:   /s/ Ying
Wang         
 November 28, 2018 

 Power of Attorney 

I, Qingchun Zeng, citizen of the People’s Republic of China (the “PRC”) with the identification number of ***, is the
shareholder of Shanghai Yibo Medical Devices Co., Ltd. (“Shanghai Yibo”) who holds 50% of the equity interest of Shanghai Yibo (“My Equity Interest”). Regarding My Equity Interest, I hereby unconditionally and
irrevocably authorize Shanghai ECMOHO Health Biotechnology Co, Ltd. (hereinafter referred to as the “Representative”) as my representative and to exercise the following rights during the term of this Power of Attorney: 

As my only and exclusive representative, the Representative is entitled to exercise the following rights of My Equity Interest in my name and
on my behalf: (1) to attend the shareholders’ meeting of Shanghai Yibo and sign relevant shareholders resolutions on my behalf; (2) to exercise all my shareholder rights according to the laws and the articles of association of
Shanghai Yibo, including without limitation to shareholder’s voting right and the rights to sell, assign, pledge or dispose of all or part of My Equity Interest; and (3) as my representative, to designate and vote for the legal
representative, board chairman, director of board, supervisor, general manager and other senior management. 
 Within the scope of
authorization, the Representative is entitled to, on my behalf, execute the transfer agreement as provided in the Exclusive Call Option Agreement (to which I shall be a party), and perform the obligations under the Equity Interest Pledge Agreement
and the Exclusive Call Option Agreement to which I am a party dated as of the date hereof. The exercise of such right shall not place any restrictions to this Power of Attorney. 

 Except as otherwise provided in this Power of Attorney, the Representative is entitled to
assign, use or dispose of the cash dividends and other non-cash income incurred from My Equity Interest in other ways in accordance with my written or oral instructions. 

Except as otherwise provided in this Power of Attorney, all the actions of the Representative regarding My Equity Interest may be made in its
own discretion without any of my written or oral instructions. 
 All the actions of the Representative regarding My Equity Interest shall
be deemed to be actions of myself, and all the documents executed by the Representative shall be deemed to be executed by myself. I will acknowledge all such actions and documents. 

The Representative has the right to sub-authorize other qualified representative to perform the
above-mentioned matters and to exercise the right of My Equity Interest without notifying me in advance or obtaining my approval. 
 This
Power of Attorney shall become effective from the date of its execution and shall remain effective and irrevocable as long as I am a shareholder of Shanghai Yibo. 

During the term of this Power of Attorney, I hereby waive all the rights authorized to the Representative related to My Equity Interest
according to this Power of Attorney and will not exercise such rights by myself. 
 Signature: /s/ Qingchun
Zeng     
 November 28, 2018EX-10.5

 Exhibit 10.5 

Confirmation Letter 
 Whereas: 

 

	1.	 I, Zeng Qingchun, a citizen of the People’s Republic of China, whose ID card number is ***, am a
shareholder who owns 50% equity (“my equity”) in Shanghai Yibo Medical Devices Co., Ltd.; 

  

	2.	 I, Shanghai ECMOHO Health Biotechnology Co., Ltd. and Shanghai Yibo Medical Devices Co., Ltd. have concluded a
series of agreements, including the Equity Pledge Contract, the Exclusive Technical Consulting and Service Agreement, the Contract on Exclusive Right of Purchase and the Power of Attorney, as well as any form of appendixes and amendments thereto
(“Such Agreements”). 

 As a party to Such Agreements, I confirm as follows: 

I will make proper arrangements in advance to ensure that, under the circumstance of my death, incapacity, divorce or other circumstances that may affect my
performance of the obligations set forth in Such Agreements, my successor, guardian, creditor, spouse or person who may obtain my equity or relevant rights (“the successor of my equity”) will agree: 

 

	(1)	 My equity shall and may be mortgaged, sold or otherwise disposed of in accordance with the provisions of Such
Agreements; 

  

	(2)	 Such Agreements will apply to the legitimate rights and interests on my equity which may be owned by the
successor of my equity; 

  

	(3)	 In any case, the successor of my equity will neither make any request inconsistent with the contents of Such
Agreements regarding my equity, nor take any action inconsistent with the contents of Such Agreements. 

 It is hereby confirmed. 

Signed by: /s/ Zeng Qingchun 

November 28, 2018 

 Confirmation Letter 

Whereas: 
  

	1.	 I, Wang Ying, a citizen of the People’s Republic of China, whose ID card number is ***, am a shareholder
who owns 50% equity (“my equity”) in Shanghai Yibo Medical Devices Co., Ltd.; 

  

	2.	 I, Shanghai ECMOHO Health Biotechnology Co., Ltd. and Shanghai Yibo Medical Devices Co., Ltd. have concluded a
series of agreements, including the Equity Pledge Contract, the Exclusive Technical Consulting and Service Agreement, the Contract on Exclusive Right of Purchase and the Power of Attorney, as well as any form of appendixes and amendments thereto
(“Such Agreements”). 

 As a party to Such Agreements, I confirm as follows: 

I will make proper arrangements in advance to ensure that, under the circumstance of my death, incapacity, divorce or other circumstances that may affect my
performance of the obligations set forth in Such Agreements, my successor, guardian, creditor, spouse or person who may obtain my equity or relevant rights (“the successor of my equity”) will agree: 

 

	(1)	 My equity shall and may be mortgaged, sold or otherwise disposed of in accordance with the provisions of Such
Agreements; 

  

	(2)	 Such Agreements will apply to the legitimate rights and interests on my equity which may be owned by the
successor of my equity; 

  

	(3)	 In any case, the successor of my equity will neither make any request inconsistent with the contents of Such
Agreements regarding my equity, nor take any action inconsistent with the contents of Such Agreements. 

 It is hereby confirmed. 

Signed by:: /s/ Wang Ying 

November 28, 2018EX-10.6

 Exhibit 10.6 

Confirmation Letter 
 Whereas: 

 

	1.	 I, Ying Wang, a Chinese citizen with the ID number of ***, is the spouse of Qingchun Zeng, who is the
shareholder of Shanghai Yibo Medical Devices Co., Ltd.; 

  

	1.	 Qingchun Zeng, Shanghai ECMOHO Health Biotechnology Co, Ltd. and Shanghai Yibo Medical Devices Co., Ltd. have
entered into a series of agreements and any exhibits and amendments thereto, including the Equity Interest Pledge Agreement, the Exclusive Technology Consulting and Service Agreement, the Exclusive Call Option Agreement and the Power of Attorney
(the “Agreements”). 

 I hereby confirm that I have read and understood the terms of the Agreements, and I will,
if required, be a party to such Agreements and be bound by such Agreements. 
 I further confirm and agree that: 

 

	 	(1)	 the equity interest held by Qingchun Zeng under the Agreements (the “Zeng’s
Share”) shall belong to Qingchun Zeng under any circumstances, and Qingchun Zeng may, without my consent, mortgage, sell or dispose of Zeng’s Share in any other manner according to the Agreements; 

 

	 	(2)	 Qingchun Zeng may execute any amendment and supplement to the Agreements related to Qingchun Zeng’s Shares
without my signature, confirmation, agreement or consent; 

	 	(3)	 under any circumstances, I will not claim for any rights in connection with Zeng’s Share which are
inconsistent with the provisions of the Agreements, or take any action inconsistent with the provisions of the Agreements; 

  

	 	(4)	 the portion of equity interest that may belong to me (“My Share”) in the equity interest held
by Qingchun Zeng shall and may be mortgaged, sold or disposed of in any other manner according to the Agreements; 

  

	 	(5)	 if required, I agree to sign and be a party to the Agreements, and undertake that any amendment and supplement
of the Agreements will not be inconsistent with the rights and obligations of Qingchun Zeng under the Agreements; 

  

	 	(6)	 I will not claim for any rights in connection with My Share which are inconsistent with the provisions of the
Agreements, or take any action inconsistent with the provisions of the Agreements. 

 Hereby confirm. 

 

			
		 	Ying Wang
		
	                                 (Signature):	 	 /s/ Ying Wang

		 	November 28, 2018
		 	

 Confirmation Letter 

Whereas: 
  

	1.	 I, Qingchun Zeng, a Chinese citizen with the ID number of ***, is the spouse of Ying Wang, who is the
shareholder of Shanghai Yibo Medical Devices Co., Ltd.; 

  

	2.	 Ying Wang, Shanghai ECMOHO Health Biotechnology Co, Ltd. and Shanghai Yibo Medical Devices Co., Ltd. have
entered into a series of agreements and and any exhibits and amendments thereto, including the Equity Interest Pledge Agreement, the Exclusive Technology Consulting and Service Agreement, the Exclusive Call Option Agreement and the Power of Attorney
(the “Agreements”). 

 I hereby confirm that I have read and understood the terms of the Agreements, and I will,
if required, be a party to such Agreements and be bound by such Agreements. 
 I further confirm and agree that: 

 

	 	(1)	 the equity interest held by Ying Wang under the Agreements (the “Wang’s Share”)
shall belong to Ying Wang under any circumstances, and Ying Wang may, without my consent, mortgage, sell or dispose of Wang’s Share in any other manner according to the Agreement; 

 

	 	(2)	 Ying Wang may execute any amendment and supplement to the Agreements related to Wang’s Share without my
signature, confirmation, agreement or consent; 

	 	(3)	 under any circumstances, I will not claim for any rights in connection with Wang’s Share which are
inconsistent with the provisions of the Agreements, or take any action inconsistent with the provisions of the Agreements; 

  

	 	(4)	 the portion of equity interest that may belong to me (“My Share”) in the equity interest held
by Ying Wang shall and may be mortgaged, sold or disposed of in any other manner according to the Agreements; 

  

	 	(5)	 if required, I agree to sign and be a party to the Agreements, and undertake that any amendment and supplement
of the Agreements will not be inconsistent with the rights and obligations of Ying Wang under the Agreements; 

  

	 	(6)	 I will not claim for any rights in connection with My Share which are inconsistent with the provisions of the
Agreements, or take any action inconsistent with the provisions of the Agreements. 

 Hereby Confirm. 

 

			
		 	Qingchun Zeng
		
	                                 (Signature):	 	 /s/ Qingchun Zeng

		 	November 28, 2018

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