SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                                                                      
                                  SCHEDULE 13D
                                 (Rule 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                                (Amendment No. )
                             
                            CHINA NATURAL GAS, INC.
________________________________________________________________________________
                                (Name of Issuer)


                    Common Stock, par value $.0001 per share
________________________________________________________________________________
                         (Title of Class of Securities)


                                   168910 10 7
________________________________________________________________________________
                                 (CUSIP Number)

                                   Mr. Chen Bo
                              Bodisen Biotech, Inc.
               North Part of Xinquia Road, Yang Ling Agricultural
          High-Tech Industries Demonstration Zone, Yang Ling, People's
                            Republic of China 712100

                                 86-29-87074957
________________________________________________________________________________
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                December 6, 2005
________________________________________________________________________________
             (Date of Event Which Requires Filing of This Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
?.

Note.  Schedules  filed in paper format shall include a signed original and five
copies of the  schedule,  including  all  exhibits.  See Rule 13d-7(b) for other
parties to whom copies are to be sent.


                         (Continued on following pages)

                               (Page 1 of 5 Pages)

________________________________________________________________________________

  CUSIP No. 222891 10 3              13D                     Page 2 of 5 Pages

________________________________________________________________________________
1         NAME OF REPORTING PERSONS                      
          Yangling Bodisen Biotech Development Co., Ltd.                        
          
         
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS      
          n/a
________________________________________________________________________________

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*            
          (a) |_|
          (b) |_|
________________________________________________________________________________

3         SEC USE ONLY
________________________________________________________________________________

4         SOURCE OF FUNDS*           
          OO
________________________________________________________________________________

5         CHECK BOX IF DISCLOSURE OF LEGAL  PROCEEDINGS IS REQUIRED  PURSUANT TO
          ITEM
          2(d) or 
          2(e) |_|
________________________________________________________________________________

6         CITIZENSHIP OR PLACE OF ORGANIZATION      
          China
________________________________________________________________________________


                          7   SOLE VOTING POWER
   NUMBER OF SHARES           515,942 shares of common stock.
                       _________________________________________________________


     BENEFICIALLY         8   SHARED VOTING POWER
       OWNED BY               0
                       _________________________________________________________
         EACH   
      REPORTING           9   SOLE DISPOSITIVE POWER
                              515,942 shares of common stock.

                       _________________________________________________________

     PERSON WITH         10   SHARED DISPOSITIVE POWER
                              0
                       _________________________________________________________

  11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
          515,942 shares of common stock.
________________________________________________________________________________

  12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                  
          |_|
________________________________________________________________________________

  13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          10.2%
________________________________________________________________________________

  14      TYPE OF REPORTING PERSON*
          CO
________________________________________________________________________________


                                                             Page 3 of 5 Pages

Item 1. Security and Issuer.

     This statement  relates to shares of the common stock, par value $.0001 per
share, of China Natural Gas, Inc.  (formerly  Coventure  International  Inc.), a
Delaware  corporation (the "Company").  The principal  executive  offices of the
Issuer are presently located at Tang Xing Shu Ma Building,  Suite 418, Tang Xing
Road, Xian High Tech Area, Xian, Shaanxi Province, China.

Item 2. Identity and Background.

     This statement is being filed by Yangling Bodisen Biotech  Development Co.,
Ltd.,  a  company  formed  under  the  laws of the  Peoples  Republic  of  China
("Bodisen").  Bodisen is a wholly-owned  subsidiary of Bodisen Biotech,  Inc., a
corporation formed under the laws of the state of Delaware. Bodisen maintains an
office  at  North  Part of  Xinquia  Road,  Yang  Ling  Agricultural,  High-Tech
Industries Demonstration Zone, Yang Ling, People's Republic of China.

     On December 6, 2005,  the Company  entered into and closed a share purchase
agreement with Xian Xilan Natural Gas Co., Ltd., a corporation  formed under the
laws  of  the  People's  Republic  of  China  ("Xilan"),  and  each  of  Xilan's
shareholders,  including  Bodisen (the  "Purchase  Agreement").  Pursuant to the
Agreement,  the Company acquired all of the issued and outstanding capital stock
of Xilan from the Xilan shareholders in exchange for 4,000,000 shares of Company
common stock.  In connection  with the acquisition of Xilan on December 6, 2005,
Chen Bo,  President  and a member of the Board of Directors of Bodisen  Biotech,
Inc. will be appointed as a member of the Board of Directors the Company.

     During  the past  five  years,  neither  Mr.  Bo nor  Bodisen  has been (a)
convicted in a criminal  proceeding  (excluding  traffic  violations  or similar
misdemeanors,  if any), or (b) been a party to a civil  proceeding of a judicial
or administrative body of competent  jurisdiction and as a result thereof was or
is subject to a judgment,  decree or final order enjoining future violations of,
or prohibiting or mandating  activities  subject to, federal or state securities
laws or finding any violation with respect to such laws.

Item 3. Source and Amount of Funds or Other Consideration.

     The sole  source of  consideration  for the  issuance  of the shares of the
Company owned by Bodisen was the tender of their ownership of outstanding shares
of Xilan pursuant to the Purchase Agreement.

Item 4. Purpose of Transaction.

        See Item 2 above.

Item 5. Interest in Securities of the Issuer.

     Under the rules and regulations of the Securities and Exchange  Commission,
Bodisen beneficially owns 515,942 shares of common stock,  representing 10.2% of
the  outstanding  shares of  common  stock of the  Company.  The  percentage  of
outstanding  shares of common  stock is computed  based on  5,051,022  shares of
common stock outstanding.  Except for the transactions described herein, neither
Mr. Bo nor Bodisen has any plans, arrangements or agreements for the acquisition
or  issuance  of  additional  shares  of the  Company's  common  stock  or other
securities convertible into equity securities of the Company.


                                                              Page 4 of 5 Pages

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to
Securities of the Issuer.

        None.

Item 7. Material to be Filed as Exhibits.

         1.    Securities  Purchase  Agreement  dated as of December 6, 2005, by
               and among  Coventure  International  Inc., Xian Xilan Natural Gas
               Co.,Ltd.  and  each  of  Xilan's  shareholders  (incorporated  by
               reference to the Company's Form 8-K filed on December 9, 2005).


                                   SIGNATURES
                                   ----------
 
     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
accurate.

December 19, 2005
                                                  YANGLING BODISEN BIOTECH
                                                  DEVELOPMENT CO, LTD.


                                                   By: /s/ CHEN BO
                                                   ---------------             
                                                   Name: Chen Bo
                                                   Title: President