FORM
      OF
      LOCK-UP AGREEMENT

    


    Date:
      __________________

    


    Exchanging
      Shareholders referred to below:

    


    
      	 	
              Re:

            	
              Share
                Exchange Agreement dated November 22, 2006 (the “Agreement”)
                by and among, Manas Petroleum Corporation (formerly known as Express
                Systems Corporation) (the “Company”),
                DWM Petroleum AG (“DWM Petroleum”) and the Exchanging Shareholders
                signatory thereto (each, an “Exchanging
                Shareholder”
                and collectively referred to as the “Exchanging
                Shareholders”)

            


    

     

    Ladies
      and Gentlemen:

     

    Defined
      terms not otherwise defined herein (the “Letter
      Agreement”)
      shall
      have the meanings set forth in the Agreement. The undersigned irrevocably agrees
      with the Exchanging Shareholders that, for the period set forth herein (such
      period, the “Restriction
      Period”),
      the
      undersigned will not offer, sell, contract to sell, pledge or otherwise dispose
      of, or enter into any transaction which is designed to, or might reasonably
      be
      expected to, result in the disposition (whether by actual disposition or
      effective economic disposition due to cash settlement or otherwise) by the
      undersigned or any affiliate of the undersigned or any person in privity with
      the undersigned or any affiliate of the undersigned, directly or indirectly,
      (otherwise than in the filing of a registration statement with the U.S.
      Securities and Exchange Commission by the Company) in respect of, or establish
      or increase a put equivalent position or liquidate or decrease a call equivalent
      position within the meaning of Section 16 of the Exchange Act and the rules
      and
      regulations of the Commission promulgated thereunder with respect to, any shares
      of Common Stock or Common Stock Equivalents beneficially owned, held or
      hereafter acquired by the undersigned (the “Securities”).
      Beneficial
      ownership shall be calculated in accordance with Section 13(d) of the Exchange
      Act. In order to enforce this covenant, the Company will impose irrevocable
      stop-transfer instructions preventing the transfer agent from effecting any
      actions in violation of this agreement.

    


    Notwithstanding
      the foregoing and subject to the limitations and requirements of Rule 144 of
      the
      Securities Act of 1933, as amended (“Securities Act”), after the date which is a
      full (i) 12 months from the date of the closing of the Agreement ( the “Trigger
      Date”), the restrictions on transfer set forth above shall not apply to or
      restrict the sales an amount of Common Stock or Common Stock Equivalents equal
      to 50% of the total amount of Common Stock beneficially owned by the undersigned
      as of the Trigger Date; and (ii) 18 months from the Trigger Date, the
      restrictions on transfer set forth above shall not apply to or restrict the
      sales of Common Stock or Common Stock Equivalents for the remaining shares
      of
      Common Stock beneficially owned by the undersigned. All share amounts shall
      be
      subject to adjustment for reverse and forward stock splits, stock dividends,
      recapitalizations and the like. Additionally,
      the Company may, at any time and at its sole option, remove any and all
      restrictions made pursuant to this Letter Agreement so long such removal applies
      equally to each of the Exchanging Shareholders.

     

    This
      Letter Agreement may not be amended or otherwise modified in any respect without
      the written consent of each of the Company, the Exchanging Shareholders and
      the
      undersigned. This Letter Agreement shall be construed and enforced in accordance
      with the laws of the State of Nevada, United States of America, without regard
      to the principles of conflicts of laws. The undersigned hereby irrevocably
      submit to the exclusive jurisdiction of the provincial and federal courts
      sitting in British Columbia, Canada, for the adjudication of any dispute
      hereunder or in connection herewith or with any transaction contemplated hereby
      or discussed herein, and hereby irrevocably waive, and agree not to assert
      in
      any suit, action or proceeding, any claim that it is not personally subject
      to
      the jurisdiction of any such court, or that such suit, action or proceeding
      is
      improper. The undersigned hereby irrevocably waives personal service of process
      and consents to process being served in any such suit, action or proceeding
      by
      receiving a copy thereof sent to the Company at the address in effect for
      notices to it under the Agreement and agrees that such service shall constitute
      good and sufficient service of process and notice thereof. The undersigned
      hereby waives any right to a trial by jury. Nothing contained herein shall
      be
      deemed to limit in any way any right to serve process in any manner permitted
      by
      law. The undersigned agrees and understands that this letter does not intend
      to
      create any relationship between the undersigned and the Exchanging Shareholders
      and that the Exchanging Shareholders are not entitled to cast any votes on
      the
      matters herein contemplated and that no issuance or sale of the Securities
      is
      created or intended by virtue of this letter.

     

    This
      Letter Agreement shall be binding on successors and assigns of the undersigned
      with respect to the Securities and any such successor or assign shall enter
      into
      a similar agreement for the benefit of the Exchanging Shareholders.

    


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      SIGNATURE PAGE FOLLOWS***


    
      
        
        

      

      
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    This
      letter agreement may be executed in two or more counterparts, all of which
      when
      taken together may be considered one and the same agreement.

    


    


    
      	                  
              	 	 	 
	Signature	 	 	 
	 	 	 	 
	                     
              	 	 	 
	Print Name	 	 	 
	 	 	 	 
	                      
              	 	 	 
	Position in Company	 	 	 
	 	 	 	 
	 	 	 	 
	Address for Notice:	 	 	 
	 	 	 	 
	              
              	 	 	 
	 	 	 	 
	                
              	 	 	 
	 	 	 	 
	             
              	 	 	 
	Number of shares of Common Stock	 	 	 


    

    


    By
      signing below, the Company agrees to enforce the restrictions on transfer set
      forth in this letter agreement.

    


    MANAS
      PETROLEUM CORPORATION  

    


    


    By:_________________________________    

    Name:
      Randle Barrington-Foote

    Title:  
      President        


    
      
        
        

      

      
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