Document:

Power of Attorney

 Exhibit 4.19 
 Power of Attorney 
 I, Zhiguo WANG, a Chinese citizen with Chinese
Identification Card No.: 232102196212185810, and a holder of 76.65% of the entire registered capital in Harbin Hongdoushan Science and Technology Development Co., Ltd. (the “Company”) (“My Shareholding”), hereby irrevocably
authorize Heilongjiang Jingshangjing Bio-Technology Development Co., Limited (“WFOE”) to exercise the following rights relating to My Shareholding during the term of this Power of Attorney: 

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 Company; 2) exercise all the shareholder’s rights and shareholder’s voting rights I am entitled to under the laws of China and Company’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, supervisor, the
manager and other senior management members of Company. 
 Without limiting the generality of the powers granted hereunder, 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 WFOE shall be deemed as my own actions, and all the documents related to My Shareholding executed by WFOE shall be deemed to be executed by me. I hereby acknowledge and ratify those actions and/or documents by WFOE.

 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 Company. 
 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 

 
			
	Zhiguo WANG
		
	By:	 	 /s/ Zhiguo Wang

	
	November 5th, 2010

  

			
	 Witness:
	 	 /s/ Shumei Huang

	
	 Name:

	
	 November 5th, 2010

  
 2Power of Attorney

 Exhibit 4.20 
 Power of Attorney 
 I, Guifang QI, a Chinese citizen with Chinese
Identification Card No.: 23210219621101282x, and a holder of 18.53% of the entire registered capital in Harbin Hongdoushan Science and Technology Development Co., Ltd. (the “Company”) (“My Shareholding”), hereby irrevocably
authorize Heilongjiang Jingshangjing Bio-Technology Development Co., Limited (“WFOE”) to exercise the following rights relating to My Shareholding during the term of this Power of Attorney: 

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 Company; 2) exercise all the shareholder’s rights and shareholder’s voting rights I am entitled to under the laws of China and Company’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, supervisor, the
manager and other senior management members of Company. 
 Without limiting the generality of the powers granted hereunder, 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 WFOE shall be deemed as my own actions, and all the documents related to My Shareholding executed by WFOE shall be deemed to be executed by me. I hereby acknowledge and ratify those actions and/or documents by WFOE.

 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 Company. 
 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 

 
			
	Guifang QI
		
	By:	 	 /s/ Guifang Qi

	
	November 5th, 2010

  

			
	Witness:	 	 /s/ Shumei Huang

	
	Name:
	
	November 5th, 2010

  
 2Power of Attorney

 Exhibit 4.21 
 Power of Attorney 
 I, Xingming HAN, a Chinese citizen with Chinese
Identification Card No.: 232102196504240818, and a holder of 4.82% of the entire registered capital in Harbin Hongdoushan Science and Technology Development Co., Ltd. (the “Company”) (“My Shareholding”), hereby irrevocably
authorize Heilongjiang Jingshangjing Bio-Technology Development Co., Limited (“WFOE”) to exercise the following rights relating to My Shareholding during the term of this Power of Attorney: 

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 Company; 2) exercise all the shareholder’s rights and shareholder’s voting rights I am entitled to under the laws of China and Company’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, supervisor, the
manager and other senior management members of Company. 
 Without limiting the generality of the powers granted hereunder, 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 WFOE shall be deemed as my own actions, and all the documents related to My Shareholding executed by WFOE shall be deemed to be executed by me. I hereby acknowledge and ratify those actions and/or documents by WFOE.

 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 Company. 
 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 

 
			
	Xingming HAN
		
	By:	 	 /s/ Xingming Han

	
	November 5th, 2010

  

			
	 Witness:
	 	 /s/ Shumei Huang

	
	 Name:

	
	 November 5th, 2010

  
 2Cooperation and Development Contract

 Exhibit 10.1 
 Cooperation and Development Contract of 
 Yew (taxus) Yinpian

 Party A: Harbin Yew Science and Technology Development Co., Ltd. 
 Address: Beichuan Village, Pingshan Town, Acheng District, Harbin City 
 Party B: Heilongjiang Yew
Pharmaceutical Co., Ltd 
 Address: No. 2, Wuyi East Road, Economic Development Zone, Acheng District, Harbin City 

Whereas: 
 Party A is a legal
company registered in China. The technology of artificial cultivation yew (taxus) legitimately owned by the company, which is the herb provider of artificial cultivation yew (taxus). 

Party B is a legal company registered in China, which has the right to produce and sell yew medicine by using artificial cultivated yew
herb. 
 After the negotiation, Party A and Party B sign cooperation and development contract of yew (taxus) Yinpian on making
mutual benefit, common development. After feasibility study and mutual agreement , the two sides make a determination to jointly develop and manufacture the project of yew (taxus) Yinpian. The details are as below: 

I. Term and Scope of Cooperation 
 The Scope of
Cooperation: production and sale of yew (taxus) Yinpian. 
 The Term of Cooperation term: From January 9, 2010 to January 9, 2020. 10
years in total. 
 II. The Rights and Obligations of Both Parties 
 Party A: 
  

	1.	Provide artificial cultivated yew medicine in accordance with yew quality standard under Heilongjiang Food and Drug Administration [2009]148. Impurity is less than 3%.
Water is less than 10%. 

  

	2.	Party A is responsible for loading and paying transportation and insurance cost is borne by Party A. 

 

	3.	Package Requirement: Non-recyclable plastic woven bag. 

 Party B: 
  

	1.	Product yew Yinpian according to Party A’s authorization within the term of cooperation. Party B is responsible for the GMP approve of yew (taxus) Yinpian
workshop. 

	2.	Production should be strictly conducted in accordance with GMP requirements and quality standard of prescription process. If there is a quality problem, party B shall
deal with it and undertakes the relevant economic loss. 

  

	3.	Party B is responsible for all the examination and approval procedures, purchasing production equipment and packing materials. Expenses are borne by Party B.

  

	4.	Party B is responsible for signing the sales contract. With existing sales network, Party B also engages in sales and attracting investment through the country.

 III. Supply and Selling Price 
  

	1.	Supply Price: Party A should sell medicine raw material of yew (taxus) with the price of RMB 1,000,000 Yuan/ton to Party B. 

 

	2.	Selling Price: Party B should sell yew (taxus) Yinpian with the price of RMB 1,900,000 Yuan/ ton. 

IV. Litigation; Jurisdiction 
 Any dispute
arises about the contract shall be settled by the negotiation between the two parties. If no agreement can be reached through such negotiation, the disputes shall be handled by the court in the residence of the supplier in accordance with laws.

 V. Contract Effectiveness 
 The
contract is in duplicate, and comes into effect after signing and sealing. 
 VI. Version of the Contract 

Each side holds four originals of the contract. Each party has two copies. 
 Party A: Harbin Yew Science and Technology Development Co., Ltd 
  

			
	Person in Charge: Signature /s/ Zhiguo Wang	  	
		  	

		
	Party B: Heilongjiang Yew Pharmaceutical Co., Ltd	  	
		
	Person in Charge: Signature /s/ Xingming Han	  	

 January 9, 2010 
 Signing Place: Floor 5, No. 18, Hengshan Road, Xiangfang District, Harbin City, 
 Heilongjiang Province

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