Document:

Exhibit
      10.20

    

    SPENCER
      TRASK VENTURES, INC.

    535
      Madison Avenue, 18th
      Floor

    New
      York, New York 10022

    

    December
      14, 2005

    

    Modigene
      Inc. 

    8000
      Towers Crescent Drive, Suite 1300

    Vienna,
      Virginia 22182

    
      	Attn.:	
              Shai
                Novik

              President

            

    

     

    
      	
            	Re:	
              Finder’s
                Fee Agreement

            

    

    

    Dear
      Mr.
      Novik:

    

    This
      will
      confirm our agreement, referred to in Section 3(h) of the Placement Agency
      Agreement (the “Agency Agreement”), dated August 11, 2005, between Spencer Trask
      Ventures, Inc. (“Spencer Trask”) and Modigene Inc., a Delaware corporation (the
“Company”), to act as a non-exclusive finder for the Company. 

    

    In
      the
      event the Company or any of its affiliates shall enter into a Transaction (as
      defined below) with any party introduced to the Company by Spencer Trask,
      directly or indirectly, at any time prior to the date which is five (5) years
      after Closing (as defined in the Agency Agreement) (the “Finder Term”), then the
      Company shall pay to Spencer Trask a cash fee (the “Finder’s Fee”) according to
      the following: 

     

    	(a)  	
            7%
              of the first $1,000,000 or portion thereof of the consideration paid
              in
              such transaction; plus 

          

    	(b)  	
            6%
              of the next $1,000,000 or portion thereof of the consideration paid
              in
              such transaction; plus

          

    	(c)  	
            5%
              of the next $5,000,000 or portion thereof of the consideration paid
              in
              such transaction; plus

          

    	(d)  	
            4%
              of the next $1,000,000 or portion thereof of the consideration paid
              in
              such transaction; plus

          

    	(e)  	
            3%
              of the next $1,000,000 or portion thereof of the consideration paid
              in
              such transaction; plus

          

    	(f)  	
            2.5%
              of any consideration paid in such transaction in excess of
              $9,000,000.

          

     

    For
      the
      purposes hereof a “Transaction” shall include (i) any merger, joint venture or
      other business combination involving the Company, (ii) any acquisition of all
      or
      substantially all of the assets, or all or substantially all of the outstanding
      capital stock, of the Company, (iii) any private placement, syndication or
      other
      sale by the Company of equity or debt securities of the Company or (iv) any
      investment in the Company by any individual or entity, including, without
      limitation, any strategic partner, financial institution, investor or customer.
      With regard to clauses (iii) and (iv) of the preceding sentence, if the
      provisions of Section 3(g) of the Agency Agreement apply to such transaction,
      then the provisions of such Section 3(g) shall control and any fees due and
      payable to Spencer Trask as a result of such transaction, shall be paid in
      accordance with such Section 3(g). Any such Finder's Fee due to Spencer Trask
      will be paid at the closing of the particular Significant Corporate Transaction
      for which the Finder's Fee is due. Notwithstanding the foregoing, no Finder’s
      Fee shall be payable in respect of an investment in the Company by Spencer
      Trask
      and/or its related parties or affiliates.

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

     

    In
      the
      event that, during the Finder Term, Spencer Trask introduces the Company to
      an
      underwriter (as a potential candidate to underwrite the Company’s initial public
      offering), which underwriter participates in the initial public offering of
      the
      Company’s securities, then the Company shall pay to Spencer Trask a cash fee
      equal to 1% of the gross proceeds from the sale of the Company’s securities in
      such offering through such underwriter.

    

    The
      Company shall have the right, in its sole discretion, to reject any third
      party’s offer or to abandon any Significant Corporate Transaction undertaken by
      the Company prior to the actual closing of such Significant Corporate
      Transaction. Any determination as to whether to consummate a Significant
      Corporate Transaction shall be made by the Company’s Board of Directors, in its
      sole discretion.

    

    Spencer
      Trask shall be paid the Finder’s Fee in cash, regardless of the type of
      consideration received by the Company in connection with a Significant Corporate
      Transaction, which fee shall be payable at the closing of such Significant
      Corporate Transaction (unless consideration for such Significant Corporate
      Transaction is received by the Company or its stockholders at a later time
      in
      which case Spencer Trask shall be paid when such consideration is received
      by
      the Company or its stockholders).

    

    For
      purposes of calculating any Finder’s Fee to which Spencer Trask has demonstrated
      its entitlement, the transaction value of each Significant Corporate Transaction
      undertaken by the Company shall not be aggregated with the transaction value
      of
      any other Significant Corporate Transaction previously undertaken by the
      Company. 

    

    This
      letter agreement (i) shall
      be
      governed by, and construed in accordance with, the laws of the State of New
      York,
      (ii)
      may not be assigned by either party without prior written consent of the other
      party, (iii) may not by modified or amended except in writing, (iv) constitutes
      the entire agreement of the parties with respect to the subject matter hereof
      superseding all prior agreements and understandings, written or oral and (v)
      may
      be executed in counterparts each of which shall be deemed to be an original
      and
      all of which shall constitute one agreement.

    

    Signature
      Page Follows

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    
 

    If
      the
      foregoing accurately reflects our understanding, please so indicate by signing
      in the space provided below.

     

     

    
      	 	 	 
	 	Sincerely,
	 	 
	 	SPENCER
              TRASK
              VENTURES, INC.
	 
 	 
 	 
 
	 	By:  	/s/ William
              P. Dioguardi
	 	
              

              Name:
                William P. Dioguardi

              Title:
                President

            
	 	 

    

    Agreed
      and Accepted:

    

    This
      14th
      day of
      December, 2005

    

    MODIGENE
      INC.     

    

    

    
      	By:	
              /s/
                Shai Novik

              Name:
                Shai Novik 

              Title:
                PresidentEXHIBIT
      4.1

    

    An
      Amendment Agreement is
      made
      on May 9, 2007

    

    Among

     

    (1) SIHITECH
      COMPANY LIMITED,
      a
      company with limited liability established and existing pursuant to the laws
      of
      the British Virgin Islands (BVI) whose registered office is at TrustNet
      Chambers, P.O. Box 3444, Road Town, Tortola, British Virgin Islands;

     

    (2) MEGA
      CAPITAL GROUP SERVICES LIMITED,
      a
      company with limited liability established and existing pursuant to the laws
      of
      the BVI whose registered office is at TrustNet Chambers, P.O. Box 3444, Road
      Town, Tortola, British Virgin Islands; 

     

    (3) PROFIT
      LOYAL CONSULTANTS LIMITED,
      a
      company with limited liability established and existing pursuant to the laws
      of
      the BVI whose registered office is at TrustNet Chambers, P.O. Box 3444, Road
      Town, Tortola, British Virgin Islands; 

     

    (4) ELITE
      CONCORD INTERNATION LIMITED,
      a
      company with limited liability established and existing pursuant to the laws
      of
      the BVI whose registered office is at TrustNet Chambers, P.O. Box 3444, Road
      Town, Tortola, British Virgin Islands; 

     

    (5) CHINA
      CENTURY HOLDINGS GROUP LIMITED,
      a
      company with limited liability established and existing pursuant to the laws
      of
      the BVI whose registered office is at TrustNet Chambers, P.O. Box 3444, Road
      Town, Tortola, British Virgin Islands; 

     

    (6) SHINING
      GROUTH INVESTMENT GROUP LIMITED,
      a
      company with limited liability established and existing pursuant to the laws
      of
      the BVI whose registered office is at TrustNet Chambers, P.O. Box 3444, Road
      Town, Tortola, British Virgin Islands; 

     

    (7) YUCHENG
      TECHNOLOGIES LIMITED, a
      wholly
      owned subsidiary of CUAQ and a company incorporated under the laws of the BVI
      whose registered office is at Room 1708, Dominion Centre 43-59 Queen's Road
      East, Wanchai, Hong Kong S.A.R. and successor to CHINA UNISTONE ACQUISITION
      CORP., a corporation formerly organized under the laws of the State of
      Delaware;

     

    (8) CHIH
      CHEUNG;

     

    (9) JAMES
      LI; and

     

    (10) JAMES
      PREISSLER;

     

    Whereas

     

    The
      Parties have signed an agreement for sale and purchase of shares of Ahead
      Billion Venture Limited and Port Wing Development Company Limited as of December
      20, 2005, as amended (the SPA).

    

    It
      is agreed
      as
      follows:

    

    1.
      The
      Parties agree that Section 2.2 (c) (ii) (b) shall be deleted and replaced by
      the
      following: 

     

    “773,045
      ordinary shares of CUAQ Sub, no par per share, to the Sihitech Holdingscos,
      at
      Closing. If the net profit as shown in the pro forma table in the notes to
      the
      audited consolidated financial statements of CUAQ Sub and its subsidiaries
      for
      the year ended December 31, 2006, plus all the Public Company Compliance
      Expenses, is lower than US$6,073,941, the Sihitech Holdingcos shall, on a joint
      and several basis, promptly return the certificates representing 773,045 shares
      of CUAQ Sub Stock for no additional consideration”; and

    

    2.
      The
      Parties agree that except as amended hereby, the provisions of the SPA, as
      previously amended, are confirmed and shall remain unchanged and shall continue
      in full force and effect.

     

    IN
      WITNESS WHEREOF, the Parties have caused this Agreement to be executed as of
      the
      date first written above.

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    
      	For
              and on behalf of	 	For
              and on behalf of
	Sihitech
              Company Limited	 	Elite
              Concord International Limited
	 	 	 	 	 
	By:	
              /s/
                HONG Weidong 

            	 	By:	
              /s/
                ZENG Shuo 

            
	 	
              
                

              

              Name:
                HONG Weidong

            	 	 	
              
                
Name:
                ZENG Shuo

            
	 	
              Title:
                Authorized Representative

            	 	
            	
              Title:
                Authorized Representative

            
	 	 	 	 	 
	For
              and on behalf of	 	For
              and on behalf of
	
              Mega
                Capital Group Services Limited

            	 	China
              Century Holdings Group Limited
	 	 	 	 	 
	By:	
              /s/
                WANG Yanmei 

            	 	By:	
              /s/
                ZHONG Mingchang 

            
	 	
              
                
Name:
                WANG Yanmei

            	 	 	
              
                
Name:
                ZHONG Mingchang

            
	 	
              Title:
                Authorized Representative

            	 	 	
              Title:
                Authorized Representative

            
	 	 	 	 	 
	For
              and on behalf of	 	For
              and on behalf of
	Profit
              Loyal Consultants Limited	 	Shinning
              Growth Investment Group Limited
	 	 	 	 	 
	By:	
              /s/
                MA Gehua 

            	 	By:	
              /s/
                WANG Yi 

            
	 	
              
                
Name:
                MA Gehua

            	 	 	
              
                
Name:
                WANG Yi

            
	 	
              Title:
                Authorized Representative

            	 	 	
              Title:
                Authorized Representative 

            
	 	 	 	 	 
	 	
              /s/
                Chih Cheung  

            	 	For
              and on behalf of
	 	
              
                
Chih
                Cheung

            	 	Yucheng
              Technologies Limited
	 	 	 	 	 
	 	
              /s/
                James Preissler

            	 	By:	
              /s/
                Chih Cheung  

            
	 	
              
                
James
                Preissler

            	 	 	
              
                
Name:
                Chih Cheung

            
	 	 	 	 	
              Title:
                Director

            
	 	 	 	 	 
	 	 	 	 	
              /s/
                James Li  

            
	 	 	 	 	
              
                
James
                Li

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