Document:

Exhibit
      4.1

    

    SUPPLEMENTAL
      INDENTURE

    

    THIS
      SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of March 29,
      2006, is entered into by and among (i) China Security & Surveillance
      Technology, Inc., a Delaware corporation (the “Company”), (ii) each of the
      guarantors set forth in Annex A hereto (the “Guarantors”), and (iii) The
      Bank of New York, as trustee (the “Trustee”). Capitalized terms used herein but
      not otherwise defined herein shall have the respective meanings set forth in
      the
      Indenture (as defined below).

    

    WITNESSETH:

    

    WHEREAS,
      the Company, the Guarantors and the Trustee have entered into an Indenture
      (the
      "Indenture"), dated as of February 16, 2007, which sets forth the terms and
      conditions for the issuance by the Company of US$60,000,000 1.0% Guaranteed
      Senior Unsecured Convertible Notes due 2012 (the “Notes”);

    

    WHEREAS,
      Section 8.02 of the Indenture provides that the Company and the Trustee may,
      from time to time and at any time, with the consent of the holders of a majority
      in aggregate principal amount of the Notes at the time outstanding, enter into
      indentures supplemental thereto for the purpose of changing in any manner any
      of
      the provisions of the Indenture subject to the conditions set forth therein;
      

    

    WHEREAS,
      the holders of a majority in aggregate principal amount of the Notes currently
      outstanding have consented (the evidence of such consent having been obtained
      and provided to the Trustee as required under the Indenture) to the execution
      of
      this Supplemental Indenture by the parties hereto; and

    

    WHEREAS,
      the Company has complied with the requirements under the Indenture to execute
      this Supplemental Indenture and has provided the Trustee with an Officers’
Certificate and an Opinion of Counsel as conclusive evidence that the execution
      of this Supplemental Indenture complies with the applicable requirements under
      the Indenture and is otherwise authorized or permitted by this
      Indenture.

    

    NOW
      THEREFORE, in consideration of the foregoing and for other good and valuable
      consideration, the receipt of which is hereby acknowledged, the Company, the
      Guarantors and the Trustee mutually covenant and agree for the equal and ratable
      benefit of the holders of the Notes as follows: 

    

    1.  Amendments
      to the Indenture.
      The
      Indenture is hereby amended as follows:

    The
      references to “$150.0 million” and “$50.0 million”, each in the second sentence
      of Section 4.16, are hereby replaced with "$50 million” and "$5 million”,
      respectively, such that the second sentence of Section 4.16 shall read in its
      entirety as follows: 

    

    “The
      “Consolidated Tangible Net Worth Threshold” shall be equal to $50 million from
      the Issue Date until the first annual anniversary thereof, and at each annual
      anniversary of the Issue Date shall increase by an amount equal to $5 million.”

    

    2.  Ratification
      of Indenture; Supplemental Indenture Part of Indenture.
      Except
      as expressly amended hereby, the Indenture is ratified and confirmed in all
      respects and all the terms, conditions and provisions thereof shall remain
      in
      full force and effect. This Supplemental Indenture shall form a part of the
      Indenture for all purposes, and every Holder heretofore or hereafter
      authenticated and delivered shall be bound hereby. 

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    3.  Governing
      Law.
      THIS
      SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
      THE LAWS OF THE STATE OF NEW YORK.

     

    4.  Trustee
      Makes No Representation.
      The
      Trustee makes no representation as to the validity or sufficiency of this
      Supplemental Indenture. 

     

    5.     
      Counterparts. 

     

    (a)
       The
      parties may sign any number of copies of this Supplemental Indenture. Each
      signed copy shall be an original, but all of them together represent the same
      agreement. One signed copy is enough to prove this Supplemental
      Indenture.

     

    (b)
       This
      Supplemental Indenture may be executed in one or more counterparts and when
      a
      counterpart has been executed by each party, all such counterparts taken
      together shall constitute one and the same agreement. 

     

    6.  Effect
      of Headings.
      The
      Section headings herein are for convenience only and shall not effect the
      construction thereof.

     

    IN
      WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture
      to
      be duly executed as of the date first above written.

     

    CHINA
      SECURITY & SURVEILLANCE TECHNOLOGY, INC.

    

    By:
      /s/
      Tu Guo Shen 

    Name:
      Tu
      Guo Shen

    Title:
      CEO

    

    CHINA
      SAFETECH HOLDINGS LIMITED 

    

    

    By:
      /s/
      Tu Guo Shen 

    Name:
      Tu
      Guo Shen 

    Title:
      CEO

    

    CHINA
      SECURITY & SURVEILLANCE TECHNOLOGY (HK) LTD. 

    

    By:
      /s/
      Tu Guo Shen 

    Name:
      Tu
      Guo Shen

    Title:
      CEO

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    FOR
      THE PURPOSE OF SECTION 4.18(A) OF THE INDENTURE ONLY

    

    GOLDEN
      GROUP CORPORATION (SHENZHEN) LIMITED

    

    By:
      /s/
      Tu Guo Shen 

    Name:
      Tu
      Guo Shen

    Title:
      CEO

    

    SHANGHAI
      CHENG FENG DIGITAL TECHNOLOGY CO., LTD.

    

    By:
      /s/
      Tu Guo Shen 

    Name:
      Tu
      Guo Shen

    Title:
       
      CEO   

    

    CHINA
      SECURITY & SURVEILLANCE TECHNOLOGY (PRC), INC.

    

    By:
      /s/
      Tu Guo Shen 

    Name:
      Tu
      Guo Shen

    Title:
       CEO    

    

    THE
      BANK
      OF NEW YORK,

    a
      New
      York banking corporation, 

    as
      Trustee

    

    By:
      /s/
      Lici Zhu  

    Name:
      Lici Zhu 

    Title:
      Assistant TreasurerUnassociated Document

    Exhibit
      4.2

    

    

    AMENDMENT
      TO THE INVESTOR RIGHTS AGREEMENT

    
       

      
        THIS
          AMENDMENT TO THE INVESTOR RIGHTS AGREEMENT, dated as of March 29, 2007
          (this
“Amendment”),
          is
          entered into by and among (i) (a) China Security & Surveillance Technology,
          Inc., a Delaware corporation (the “Company”),
          (b)
          China Safetech Holdings Limited, a wholly-owned subsidiary of the Company,
          incorporated under the laws of British Virgin Islands (“Safetech”)
          and
          China Security & Surveillance Technology (HK) Ltd., a wholly-owned
          subsidiary of Safetech, incorporated under the laws of Hong Kong (“CSST
          HK”),
          (c)
          Golden Group Corporation (Shenzhen) Limited,
          a
          limited liability company organized and existing under the laws of the
          People’s
          Republic of China (the “PRC”)
          and a
          wholly-owned subsidiary of Safetech (“Golden”),
          Shanghai Cheng Feng Digital Technology Co., Ltd., a limited liability company
          organized and existing under the laws of the PRC and a wholly-owned subsidiary
          of CSST HK (“Cheng
          Feng”)
          and
          China Security & Surveillance Technology (PRC), Inc., a
          limited
          liability company organized and existing under the laws of the PRC and
          a
          wholly-owned subsidiary of the Company (“CSST
          PRC”,
          and
          collectively with the Company, Safetech, CSST HK, Golden and Cheng Feng,
          the
“Group
          Companies”),
          (d)
          Mr. Tu Guo Shen (“Mr.
          Tu”),
          a
          resident of the City of Hangzhou in the PRC, Ms. Li Zhi Qun (“Ms.
          Li”),
          a
          resident of the City of Shenzhen in the PRC and Whitehorse Technology Limited,
          a
          British Virgin Islands company wholly owned by Mr. Tu and the registered
          owner
          of Mr. Tu’s equity interest in the Company (“Whitehorse”,
          and
          collectively with Mr. Tu and Ms. Li, the “Controlling
          Shareholders”)
          and
          (ii) Citadel Equity Fund Ltd. (“Citadel”).
          Capitalized terms used herein but not otherwise defined herein shall have
          the
          respective meanings set forth in the Investor Rights Agreement (as defined
          below).

        

        W
          I T
          N E S S E T H

         

        WHEREAS,
          the Group Companies, the Controlling Shareholders and Citadel entered into
          that
          certain Investment Rights Agreement, dated as of February 16, 2007 (the
          “Investor
          Rights Agreement”);
          and

         

        WHEREAS,
          the parties to the Investor Rights Agreement wish to amend certain provisions
          of
          the Investor Rights Agreement. 

         

        NOW,
          THEREFORE, in consideration of the foregoing and the respective covenants
          and
          agreements et forth herein, the parties hereto agree as follows:

         

        ARTICLE
          I

        AMENDMENTS

         

        SECTION
          1.1.   Amendment.
          The
          parties hereto agree that the Investor Rights Agreement shall be amended
          as set
          forth in this Section 1.1.

         

        (a) The
          first
          sentence of Section 3.1 is hereby amended and restated as follows: 

         

        “As
          long
          as Citadel is the beneficial owner (as such term is defined in the Exchange
          Act
          and the rules and regulations promulgated thereunder (the “Beneficial
          Owner”))
          of
          the Notes then outstanding (including the principal amount of the Notes
          converted into Conversion Shares as if such conversion had not taken place
          and
          to the extent such Conversion Shares are held by Citadel at the time of
          calculating such percentage), the principal amount of which is at least
          25% of
          the principal amount of the Notes then outstanding (including the principal
          amount of the Convertible Notes converted into Conversion Shares as if
          such
          conversion had not taken place and to the extent such Conversion Shares
          are
          beneficially owned by Citadel at the time of calculating such percentage)
          (the
“Minimum
          Holdings”),
          each
          Group Company shall permit Citadel and any authorized representative thereof,
          to
          visit and inspect the properties of such Group Company, including its corporate
          and financial records, to examine its records and make copies thereof and
          to
          discuss its affairs, finances and accounts with its officers, at all such
          reasonable times and as often as may be reasonably requested upon reasonable
          notice, provided
          that
          such visits and inspections shall not unduly interrupt the daily operation
          of
          such Group Company. Each reference in this Agreement to ‘holds the Minimum
          Holdings’ shall be construed as ‘is the Beneficial Owner of the Minimum
          Holdings’.” 

         

        
          
             

          

          
             

            
              

            

          

          
             

          

        

        (b) Each
          of
          Section 3.6 and Section 3.7 is hereby deleted in its entirety. 

         

        (c) The
          first
          sentence of Section 3.9 is hereby amended and restated as follows: 

         

        “Until
          the maturity of the Notes, the Company shall not (i) have more than 60,000,000
          shares of Common Stock outstanding at any time or (ii) issue any new class
          of
          Equity Securities of the Company.”

         

        (d) Section
          3.10 is hereby amended and restated in its entirety as follows: 

         

        “3.10 Other
          Covenants.
          As long
          as Citadel is the Beneficial Owner of the Minimum Holdings, each Group
          Company
          hereby covenants and agrees as follows:

         

        “(a) No
          Group
          Company shall change the substantive responsibilities of Mr. Tu as a member
          of
          the management of such Group Company and its Subsidiaries, or substitute
          any
          other Person to perform the substantive responsibilities of Mr. Tu as such
          member of management as they are performed as of the date hereof, other
          than in
          the case of incapacity of Mr. Tu.

         

        “(b) No
          Group
          Company shall amend, alter, waive or repeal any provision of such Group
          Company’s or its Subsidiaries’ certificate of incorporation, memorandum and
          articles of association or any other organizational or constitutional documents
          of such Group Company or its Subsidiaries in a manner that would have a
          material
          adverse effect on the interests of Citadel.”

         

        (e) Each
          of
          Sections 5 and 6 is hereby deleted in its entirety.

         

        SECTION
          1.2.   Full
          Force and Effect.
          For the
          avoidance of doubt, all other provisions of the Investor Rights Agreement
          shall
          remain in full force and effect. 

         

        

        ARTICLE
          II

        MISCELLANEOUS

         

        SECTION
          2.1.   Governing
          Law.
          This
          Amendment shall be governed by and construed in accordance with the laws
          of the
          State of New York. 

         

        
          
             

          

          
             

            
              

            

          

          
             

          

        

        SECTION
          2.2.   Counterparts.
          This
          Amendment may be executed in two or more counterparts, each of which shall
          be
          deemed an original, but all of which together shall constitute one and
          the same
          instrument.

         

        

        IN
          WITNESS WHEREOF, the undersigned have executed this Investor Rights Agreement
          as
          of the day and year written above.

         

        

        
          	GROUP
                  COMPANIES:
	 
	CHINA
                  SECURITY & SURVEILLANCE TECHNOLOGY, INC. 
	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Name:
                    Tu Guo Shen

                
	 	
                  Title:
                    CEO

                

        

        
          	CHINA
                  SAFETECH HOLDINGS LIMITED
	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Name:
                    Tu Guo Shen

                
	 	
                  Title:
                    CEO

                

        

        

        
          	
                  CHINA SECURITY & SURVEILLANCE

                  TECHNOLOGY (HK) LTD.

                
	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Name:
                    Tu Guo Shen

                
	 	
                  Title:
                    CEO

                

        

        
 

        
          	GOLDEN
                  GROUP
                  CORPORATION (SHENZHEN) LIMITED
	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Name:
                    Tu Guo Shen

                
	 	
                  Title:
                    CEO

                

        

        

        

        
          	
                  SHANGHAI CHENG FENG DIGITAL

                  TECHNOLOGY CO., LTD.

                
	 
	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Name:
                    Tu Guo Shen

                
	 	
                  Title:
                    CEO

                

        

        

        

        
          	
                  CHINA SECURITY & SURVEILLANCE 

                  TECHNOLOGY (PRC), INC.

                
	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Name:
                    Tu Guo Shen

                
	 	
                  Title:
                    CEO

                

        

        

        
          
             

          

          
             

            
              

            

          

          
             

          

        

         

        
          	CONTROLLING
                  SHAREHOLDERS:
	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Mr.
                    Tu Guo Shen

                
	 	 

        

        

        
          	
                  By:
                    

                	
                  /s/
                    Li Zhi Qun

                	
                
	 	
                  Ms.
                    Li Zhi Qun

                
	 	 

        

        

         

        
          	 \WHITEHORSE
                  TECHNOLOGY LIMITED
	 	 	 
	
                  By:
                    

                	
                  /s/
                    Tu Guo Shen

                	
                
	 	
                  Name:
                    Tu Guo Shen

                
	 	
                  Title:
                    CEO

                

        

        

        

         

        Accepted
          and Agreed to:

         

         

        CITADEL
          EQUITY FUND LTD.

         

        By:
          Citadel Limited Partnership, its Portfolio Manager

         

        By:
          Citadel Investment Group, L.L.C., its General Partner

         

        

        
          	
                  By:
                    

                	
                  /s/
                    Andrew Fong

                	
                
	 	
                  Name:
                    Andrew Fong

                
	 	
                  Title:
                    Authorized Signatory

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