Document:

English translation of Supplementary Agreement dated November 10, 2011

 Exhibit 10.19 
 Supplementary Agreement to Exclusive Technology Support and Technology Services Agreement 
 This Supplementary Agreement to Exclusive Technology Support and Technology Services Agreement (the “Supplementary Agreement”) is entered into by and among the following parties on
November 10, 2011: 
  

			
	Party A:	  	Duowan Entertainment Information Technology (Beijing) Company
		
	Address:	  	Room B1507, Huizhi Building, No. 9 Xueqing Road, Haidian District, Beijing
		
	Party B:	  	Beijing Tuda Science and Technology Company Limited
		
	Address:	  	Suite B1506, Huizhi Plaza, 9 Xueqing Road, Haidian District, Beijing

 WHEREAS: 

(A) Party A and Party B entered into the Exclusive Technology Support and Technology Services Agreement on December 3, 2009 (the “Original
Agreement”); 
 (B) Both parties propose to revise Section 6.3 of the Original Agreement. 

Through friendly negotiation, the parties hereto agree to supplement the Original Agreement as follows: 

1. Section 6.3 of Original Agreement shall be deleted and be replaced by the following: 

“6.3 Within the term of the Agreement, Party B shall not terminate the Agreement under any circumstance. Party A is entitled to
terminate the Agreement by written notice to Party B 30 days in advance.” 
 2. The Original Agreement shall be applied to
the matters not provided in this Supplementary Agreement. 
 3. This Supplementary Agreement shall prevail should there be any
inconsistency between the Original Agreement and this Supplementary Agreement. 
 4. This Supplementary Agreement shall be
executed in two originals, each party holding one original. All the originals shall have the same legal effect. 
 Both parties authorize their
authorized representatives to sign this Supplementary Agreement on the date indicated above and to make effective upon signing. 

  
 1 

 Party A: Duowan Entertainment Information Technology (Beijing) Company (Seal) 

 

			
	Signature:	  	/s/ Xueling Li
	Name:	  	Xueling Li
	Position:	  	Legal Representative/Authorized Representative

 Party B: Beijing Tuda Science and Technology Company Limited (Seal) 

 

			
	Signature:	  	/s/ Jin Cao
	Name:	  	Jin Cao
	Position:	  	Legal Representative/Authorized Representative

  
 2English translation of Confirmation Letter dated November 10, 2011

 Exhibit 10.20 
 Confirmation Letter 
 Duowan Entertainment Information Technology (Beijing) Company
(“Beijing Duowan”) and Beijing Tuda Science and Technology Company Limited (“Beijing Tuda”) have entered into an Exclusive Technology Support and Technology Services Agreement (the “Original Agreement”) on
December 3, 2009. According to Section 2 of the Original Agreement, both parties confirm the fee rate and payment of services as follows: 
 1. Fee rate of services: Beijing Tuda shall, according to the Original Agreement, pay services fees to Beijing Duowan at the rate of 10% of Beijing Tuda’s annual revenue of each year. 

2. Payment time: The time of paying services fees above shall be determined by Beijing Duowan according to actual situation. Beijing Tuda shall arrange
payment after receiving written notice from Beijing Duowan. 
 3. This confirmation letter shall prevail should there be any inconsistency
between the Original Agreement and this confirmation letter. 
 Party A: Duowan Entertainment Information Technology (Beijing) Company
(Seal) 
  

			
	Signature:	 	/s/ Xueling Li
	Name:	 	Xueling Li
	Position:	 	Legal Representative/Authorized Representative

 Party B: Beijing Tuda Science and Technology Company Limited (Seal) 

 

			
	Signature:	 	/s/ Jin Cao
	Name:	 	Jin Cao
	Position:	 	Legal Representative/Authorized Representative

 Date: November 10, 2011 

  
 1English translation of Powers of Attorney dated May 27, 2011

 Exhibit 10.21 
 Power of Attorney 
 The undersigned, Xueling Li, a Chinese citizen, and a
holder of 97.7% of the entire registered capital in Beijing Tuda Science and Technology Company Limited (“Beijing Tuda”) (the “Shareholding”), hereby irrevocably authorize Duowan Entertainment Information Technology (Beijing)
Company Limited (“Duowan Beijing”) to exercise the following rights relating to the Shareholding during the term of this Power of Attorney: 
 Duowan Beijing is hereby authorized to act on behalf of the undersigned as the sole and exclusive agent with respect to all matters concerning the Shareholding, including, but not limited to: 1) attend
shareholders’ meetings of Beijing Tuda; 2) exercise all the shareholder’s rights and shareholder’s voting rights of the undersigned under laws and the articles of association of Beijing Tuda, including, but not limited to, the sale or
transfer or pledge or disposition of all or any part of the Shareholding; and 3) designate and appoint on behalf of the undersigned the legal representative (chairperson), directors, supervisors, the chief executive officer and other senior
management members of Beijing Tuda. 
 Without limiting the generality of the powers granted hereunder, Duowan Beijing shall
have the power and authority under this Power of Attorney to execute the Transfer Contracts stipulated in Exclusive Option Agreement, to which the undersigned is required to be a party, on behalf of the undersigned, and to effect the terms of the
Share Pledge Agreement and Exclusive Option Agreement, both dated the date hereof, to which the undersigned is a party. 
 All
the actions associated with the Shareholding conducted by Duowan Beijing shall be deemed as the actions of the undersigned, and all the documents related to the Shareholding executed by Duowan Beijing shall be deemed to be executed by the
undersigned. The undersigned hereby acknowledge and ratify those actions and/or documents by Duowan Beijing. 
 Duowan Beijing
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 or obtaining consent from the undersigned. 

This Power of Attorney shall be irrevocable and continuously valid from the date of execution of this Power of Attorney, so long as the
undersigned is a shareholder of Beijing Tuda. 
 During the term of this Power of Attorney, the undersigned hereby waives all
the rights associated with the Shareholding, which have been authorized to Beijing Duowan through this Power of Attorney, and shall not exercise such rights by itself. 
  

			
	By:	 	/s/ Xueling Li
		
	Dated:	 	May 27, 2011

  
 1 

 Power of Attorney 

The undersigned, Bin Zhao, a Chinese citizen, and a holder of 1.5334% of the entire registered capital in Beijing Tuda Science and
Technology Company Limited (“Beijing Tuda”) (the “Shareholding”), hereby irrevocably authorize Duowan Entertainment Information Technology (Beijing) Company Limited (“Duowan Beijing”) to exercise the following rights
relating to the Shareholding during the term of this Power of Attorney: 
 Duowan Beijing is hereby authorized to act on behalf
of the undersigned as the sole and exclusive agent with respect to all matters concerning the Shareholding, including, but not limited to: 1) attend shareholders’ meetings of Beijing Tuda; 2) exercise all the shareholder’s rights and
shareholder’s voting rights of the undersigned under laws and the articles of association of Beijing Tuda, including, but not limited to, the sale or transfer or pledge or disposition of all or any part of the Shareholding; and 3) designate and
appoint on behalf of the undersigned the legal representative (chairperson), directors, supervisors, the chief executive officer and other senior management members of Beijing Tuda. 

Without limiting the generality of the powers granted hereunder, Duowan Beijing shall have the power and authority under this Power of
Attorney to execute the Transfer Contracts stipulated in Exclusive Option Agreement, to which the undersigned is required to be a party, on behalf of the undersigned, and to effect the terms of the Share Pledge Agreement and Exclusive Option
Agreement, both dated the date hereof, to which the undersigned is a party. 
 All the actions associated with the Shareholding
conducted by Duowan Beijing shall be deemed as the actions of the undersigned, and all the documents related to the Shareholding executed by Duowan Beijing shall be deemed to be executed by the undersigned. The undersigned hereby acknowledge and
ratify those actions and/or documents by Duowan Beijing. 
 Duowan Beijing 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 or obtaining consent from the undersigned. 
 This Power of Attorney shall be irrevocable and continuously valid from the date of execution of this Power of Attorney, so long as the undersigned is a shareholder of Beijing Tuda. 

During the term of this Power of Attorney, the undersigned hereby waives all the rights associated with the Shareholding, which have been
authorized to Beijing Duowan through this Power of Attorney, and shall not exercise such rights by itself. 
  

			
	By:	 	/s/ Bin Zhao
		
	Dated:	 	May 27, 2011

  
 2 

 Power of Attorney 

The undersigned, Jin Cao, a Chinese citizen, and a holder of 0.7666% of the entire registered capital in Beijing Tuda Science and
Technology Company Limited (“Beijing Tuda”) (the “Shareholding”), hereby irrevocably authorize Duowan Entertainment Information Technology (Beijing) Company Limited (“Duowan Beijing”) to exercise the following rights
relating to the Shareholding during the term of this Power of Attorney: 
 Duowan Beijing is hereby authorized to act on behalf
of the undersigned as the sole and exclusive agent with respect to all matters concerning the Shareholding, including, but not limited to: 1) attend shareholders’ meetings of Beijing Tuda; 2) exercise all the shareholder’s rights and
shareholder’s voting rights of the undersigned under laws and the articles of association of Beijing Tuda, including, but not limited to, the sale or transfer or pledge or disposition of all or any part of the Shareholding; and 3) designate and
appoint on behalf of the undersigned the legal representative (chairperson), directors, supervisors, the chief executive officer and other senior management members of Beijing Tuda. 

Without limiting the generality of the powers granted hereunder, Duowan Beijing shall have the power and authority under this Power of
Attorney to execute the Transfer Contracts stipulated in Exclusive Option Agreement, to which the undersigned is required to be a party, on behalf of the undersigned, and to effect the terms of the Share Pledge Agreement and Exclusive Option
Agreement, both dated the date hereof, to which the undersigned is a party. 
 All the actions associated with the Shareholding
conducted by Duowan Beijing shall be deemed as the actions of the undersigned, and all the documents related to the Shareholding executed by Duowan Beijing shall be deemed to be executed by the undersigned. The undersigned hereby acknowledge and
ratify those actions and/or documents by Duowan Beijing. 
 Duowan Beijing 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 or obtaining consent from the undersigned. 
 This Power of Attorney shall be irrevocable and continuously valid from the date of execution of this Power of Attorney, so long as the undersigned is a shareholder of Beijing Tuda. 

During the term of this Power of Attorney, the undersigned hereby waives all the rights associated with the Shareholding, which have been
authorized to Beijing Duowan through this Power of Attorney, and shall not exercise such rights by itself. 
  

			
	By:	 	/s/ Jin Cao
		
	Dated:	 	May 27, 2011

  
 3

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