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EXHIBIT 31.1

Certification of the Chief Executive Officer and Chief Financial
Officer Pursuant to Rule 13A-14 or 15D-14 of the Securities Exchange Act of
1934, as Adopted Pursuant to Section 302 of the Sarbanes  Oxley Act of 2002

I, Guomin Li, certify that:

|1. | I have reviewed this report on Form 10-Q for the period
      ended March 31, 2008 of Chang-On International, Inc.                                                                                                                                                                                                                         
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|2. | Based on my knowledge, this report does not contain any
      untrue statement of a material fact or omit to state a material fact
      necessary in order to make the statements made, in light of the
      circumstances under which such statements were made, not misleading with
      respect to the period covered by this report;
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|3. | Based on my knowledge, the financial statements, and
      other financial information included in this report, fairly present in all
      material respects the financial condition, results of operations and cash
      flows of the small business issuer as of, and for, the periods presented
      in this report;                 
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|4. | I am responsible for establishing and maintaining
      disclosure controls and procedures (as defined in Exchange Act Rules
      13a-15(e) and 15d-15(e)) for the small business issuer and have:                                                                                                                                        
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|   | a)                                                                                                                                                                                                                                                                                                                                         
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|   | b)                                                                                                                                                                                                                                                                                                                                         
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|   | c)                                                                                                                                                                                                                                                                                                                                         
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|5. | I have disclosed, based on our most recent evaluation of
      internal control over financial reporting, to the small business issuers
      auditors and the audit committee of small business issuers board of
      directors (or persons performing the equivalent function):                                                       
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|   | a)                                                                                                                                                                                                                                                                                                                                         
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|   | b)                                                                                                                                                                                                                                                                                                                                         

|Dated: May 20, 2008 | /s/ Guomin Li                                            
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|                    | Guomin Li                                                
|                    | President, Chief Executive Officer, Chief
      Financial
|                    | Officer, Principal Accounting Officer                    

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