Document:

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EXHIBIT 10.z

                                    CONTRACT
                                                                   2nd Feb, 2002
                                               Zunyi City,Guizhou Province,China

PARTY A:  PROTON ENTERPRISES (WUHAN) LTD. (HEREINAFTER "PARTY A")

PARTY B: CONSTRUCTION HEADQUARTERS OF ZUNYI MUNICIPAL GOVERNMENT (HEREINAFTER
"PARTY B")

1.   The Contract is made to identify duties and obligations of both Parties in
     project of Liquefied Petroleum Gas (hereinafter "LPG") pipeline system
     construction and installation (hereinafter "the Project") for a mutual
     observance by both parties.
2.   Subject matter: Party A will design and install LPG pipeline system for the
     Officials' Residence of Zunyi Municipal Government with 1023 householders,
     including a central gas station, pipeline system and indoors pipeline.
3.   The Project Period: one hundred working days.
4.   Quality of the project: subject to the engineering drawing of the project
     and National LPG Pipeline Project Checking and Acceptance Standards.
5.   Total Installation Fees: The charges of the project must be approved by
     Price Supervision Bureau of Zunyi Municipal Government that will issue a
     document regulating the level of the charges for initiatory installation
     with consideration of the actual cost of the project combined with another
     referenced document No. (93) 17 issued by Guiyang Municipal Government (the
     capital city of Guizhou Province).
6.   Payment: Party B will charge the householders the installation fees in
     addition to the payment for the houses. Party B also agrees to collect the
     fees when it gives the keys to the house owners and then will pay Party A
     immediately accordingly. If Part B fails to pay the full payment for the
     project in three months, Party A has the right to suspend the access of
     facilities and will charge a penalty against Party B by 10% of what is
     unpaid.
7.   The Ownership of the Property: Party B will be owner of the project after
    accomplishment and acceptance checking of the project.

8.   Duties of Parties

Duties of Party A
a)   Party A should accomplish all the designing drawings within 15 days after
     signing of the contract and meet with technique requirement of the project.
b)   The project must be finalized and ready for use within 100 working days
     starting from the date when the construction team enters into the project
     site.
c)   Party A should assign technicians to support the future management in
     maintenance and provide training and advice to ensure normal operation of
     pipeline system.
d)   Party A should advance all the cost and expense of the project.
e)   Party A should provide technique guidance for the whole pipeline system
     maintenance.

Duties of Party B
a)   Party B should adopt measures to actively coordinate with Party A in
     collecting installation charges according to the payment term of the
     contract.
b)   Party B should make known the LPG Pipeline Users Handbook, advising the
     users to protect gas facilities and assign specific persons in charge of
     the routine gas supply system management.

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c)   Party B should offer an area actually practicably not less than 200m2 for
     central gas station according to Party A's suggestion that complies with
     the National Security Standards of the industry. Party B is also
     responsible for ensuring water and electric supply for the central gas
     station.
d)   Party B should cooperate with Party A with the installation. The delay
     caused by unfavorable installation conditions can be ignored and the
     project is thus allowed to be postponed and the related loss suffered by
     Party A should be compensated by Party B if the representatives from both
     sides acknowledge the fact by signing in written form on the spot.
e)   Party A is independently responsible for applying for various approvals
     regarding the project. 9. Responsibility for Breaching the Contract

Party A:
a)   Party A has to pay RMB10 Yuan to every actual user for every-day-delay of
     normal gas supply.
b)   Party A should fully compensate Party B' for its loss from any accident
     caused by design, or engineering quality problem, or the problem of the
     site control except that the accident is caused by the misuse of the
     facilities.
c)   Party A should provide the users with LPG Pipeline Users Handbook before
     the users start their use of the facilities and inform them the general
     knowledge of the usage and the security highlights.

Party B:
a)   Party B should not contact any other party for any reason for the pipeline
     project after signing of this contract.
b)   If breaking the contract, Party B should pay Party A 110% of the total
     contracted amount as a penalty.

10.  The contract has four original copies and each holds two. One Xerox copy
     can be made to be kept by the construction team.
11.  The contract is to be effective upon signatures by both sides along with
     Corporate Seals dully put and will be void when acceptance checking is
     passed and the payment is dully effected.
12.  Party B authorizes Party A or its assigned party as the sole LPG supplier
     after the completion of the project. Party B won't look for somebody else
     for the same purpose (a separate LPG Supply Contract will be negotiated and
     signed later).
13.  The unmentioned matters, if any, will be settled by further negotiations
     between the two parties.

PARTY A:   PROTON ENTERPRISES (WUHAN) LTD.

(Signed by the representative Mr. Sun Changjian)

PARTY B: CONSTRUCTION HEADQUARTERS OF ZUNYI MUNICIPAL GOVERNMENT

(Signed by the representative Mr. Du Zhongyun)<PAGE>
EXHIBIT 10.aa

                               GAS SUPPLY CONTRACT

Party A: Proton Enterprises (Wuhan) Ltd. (Hereinafter Party A)
Party B: Construction headquarters of Zunyi Municipal Government (Hereinafter
Party b)

Based on the Article No. 12 of the contract signed on March 2, 2002, Party A and
B agree to sign this supply contract for the pipeline system installed for the
1023 households in the residential area with the terms and conditions as
follows.

     1.   Party A guarantees that Party A or its entrusted (Party A) company
          will supply LPG for the above system in a safe and timely manner. To
          be specific, Party A will deliver cylinders by truck to the supply
          workshop and will provide the safety insurance (if the insurance
          company agrees) for every end user.
     2.   Supply price: Party agrees to provide Party B LPG according to the
          market wholesales price.
     3.   Confirmation of the quantity: Upon delivery, the staffs from both
          parties should verify the quantity by weighing the 50kg cylinders and
          when LPG is used up, the staffs have to weigh the cylinders again. The
          difference is the actual amount used.
     4.   Payment: Party B should pay Party A immediately upon the confirmation
          of the amount on such formula: Amount X unit market price of that day.
     5.   Party A should provide Party B with "LPG Users' Manual", for the
          commonsense and safety knowledge of the users.
     6.   Party A will send technicians free of charge to guide, support and
          train Party B's staffs in the operation, management and maintenance of
          the system.
     7.   Party B should appoint two staffs to be in charge of this system.
     8.   Party B agrees to pay the due right on spot or otherwise agrees to pay
          15% more of what is due then as penalty.
     9.   Party B guarantees that as soon as this agreement is signed, it should
          not negotiate with the third party for the gas supply.
     10.  Party B guarantees that the management of the system changes, the
          liability and responsibility of this contract should be transferred
          into the new successor.
     11.  Contract breaching: If Party A breaches the contract, Party B can
          refuse to pay for the LPG used, but can't stop the supply. Or
          otherwise it will be responsible for all consequences. If Party B
          breaches the contract, Party A can stop the supply and ask from Party
          B for all economic consequences.
     12.  The contract will be valid for 40 years from the date it is signed.
     13.  Any dispute should be settled through Shenzhen Arbitration Committee.

Party A:                                             Party B:

Legal Representative:                                Legal Representative

Add. Bldg. 11, Xudong Rd. Wuchange<PAGE>
Exhibit 10.ab

                              Date: August 27, 2002
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PARTY A    MADAM TIAN HAIHONG

          (Chairwoman of the Board and authorized representative of alL

           Shareholders of Zunyi Jiahong Gas Co. Ltd., Guizhou Province, China,

           hereinafter referred to as " Party A " )

PARTY B: LARGO VISTA GROUP, LTD. USA (hereinafter referred to as " Party B ")

Based on friendly negotiation, both parties agree that a reorganization for
Party A's company is to be made by both sides when necessary conditions run
mature so that developing LPG market with joint efforts can be carried out in
the city of Zunyi and possibly elsewhere nearby. At the present, before the
finalization of the above possible reorganization, both parties have unanimously
consented that Party B takes Party A's company by lease and Does the Business As
Party A ' s company, Jiahong Gas Co. Ltd. (DBA, the assets of which mainly refer
to the Nangongshan LPG depot jointly owned by the shareholders represented by
Party A in Zunyi). To this purpose, two sides have reached the agreement as
follows (This agreement supersedes any document of the same kind signed with
Party A ):

1.   CO-OPERATION MODE:
     Party A agrees to grant Party B with full rights to make use of the
     followings when Party B DBA Zunyi Jiahong Gas Co. Ltd.:

1.1  Party A's LPG depot and tanks, fueling workshop, bottle-testing center,
     office building, employee's dormitories, vehicle as well as all the
     relevant facilities, equipment, pipeline, apparatus and tools (including
     the land that the depot occupies, other outbuildings as well as all the
     means of production and living substances) etc. in the LPG Station of Depot
     located in Nangongshan, Zunyi City, Guizhou Province, China.

1.2  Business License, Code-book of Enterprise, Tax Registry Card, certificates
     of ownership for varieties of properties and all other legal documents
     necessarily required by law or government regulations for running an LPG
     company; all of the administrative and financial seals/stamps and bank
     accounts, etc.;

1.3  All the certificates of professional qualifications, licenses and other
     documents compulsively required for operating such kind of company.

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     DURATION OF LEASE:
     In principle, the agreed length of the co-operation in such mode is five
     years (namely, from August 27, 2002 to August 26, 2007 ). But Party A
     agrees that:

     a)   Party B can terminate the agreement anytime due to understandable
          reasons but with at least one month advance notice;

     b)   Once both parties reach another agreement on the same target, the
          depot, for a doable reorganization, this agreement will be no longer
          in force automatically and the execution of this agreement will also
          be ended simultaneously.

3.   LEASE FEES:
     It is agreed by both parties that Party B (lessee) pays to Party A (lessor)
     the sum of RMB150,000 ( say: Chinese currency RMB One Hundred Fifty
     Thousand Only) as an annual lease fees to be paid equally every 30th of
     next month.

4.   PARTY A 'S GUARANTEE FOR OTHER RESPONSIBILITIES AND OBLIGATIONS:

4.1  Party B is allowed understandably to put the fixed assets valued RMB1,
     680,000 (say: RMB One Million Six Hundred Eighty Thousand Only) which
     Jiahong Gas Co. Ltd. has got registered on Party B's own financial
     accounting due to the case of DBA (Do Business As ___ the assets by lease
     exceeding certain length of time is recognized recordable in lessee 's
     accounting) acknowledged by relevant law in USA; Another reason for such
     practice is Party B, as in the name of Jiahong Gas Co. Ltd. to do
     operation, consequently has to act as Jiahong Co. submitting financial and
     tax reports to the local government ( nevertheless, such act as what is
     mentioned above will never change the original ownership of the assets )
     This practice will ever last until both parties put an end to this lease
     agreement or a joint reorganization happens to replace the said lease.

4.2  Party A will actively support Party B to perform business, operation as
     well as development and try its best to assist Party B in mediating any
     public relations with local government and other organizations. Within the
     period of lease, Party A, in view of mutual interest and the future of
     long-term co-operation, will not use the name of Jiahong Co., directly or
     indirectly to be engaged in the same or similar business as Party B does in
     the area of Zunyi City or neither even elsewhere.

4.3  Regarding the charges caused by regular maintaining and normal fixing for
     the facilities and equipment under lease, Party A has to compromise with
     Party B on a solution under separated agreement.

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5.   PARTY B'S GUARANTEE FOR OTHER RESPONSIBILITIES AND OBLIGATIONS:

     Party B guarantees that

5.1  Being in the name of Party A's company to do business and operation,
     however, Party B has to bear all the costs, expenses and be also
     responsible for relevant liabilities as well as consequent obligations.

5.2  All the charges for fixing or replacing the existing assets, facilities,
     equipment or instruments aroused by improper use or misoperation have to be
     paid by Party B.

5.3  When performing business and operation in city of Zunyi and the regions
     nearby, Party B, if invests any item within LPG range (including terminal
     sales department and wholesales center) in the name of Party A's company,
     is supposed to preinform Party A and try to reach common ground so that
     Party A could support and help Party B in what is in need. With regard to
     the above-said investment, the ownership related will belong to Party B
     only. During the period of lease, those means of production and substances
     brought and newly bought by Party B into Party A's company belong to Party
     B but could be only regarded as Party B's investment for the new entity
     based on reorganization made by both parties.

6.   UNEXPECTED CASE AND DISPUTE

     If there occurs unexpected case which does not get stipulated in this
     agreement during execution, both parties are encouraged to discuss with
     each other until a new consistency is mutually made, based of which new
     stipulations will get included as a complementary agreement that will be
     regarded as an extension of this agreement and becomes an indivisible part
     of it as well. If any dispute happens, both parties are supposed to duly
     settle the problem between each other through a friendly bilateral
     negotiation. In case of failure, either party has the right to seek a legal
     solution through a lawsuit.

7.   AGREEMENT SIGNING AND EFFECTIVENESS:

     With four originals of this agreement written in both Chinese and English
     in comparison with each other, each party will keep two, all of which bear
     the same legal force and will become effective immediately when both
     signatures are duly put.

Attachments:

No.1 :     Full Power of Attorney granted by shareholders of Jiahong Gas
           Co.Ltd. in Zunyi to their representative Madam Tian Haihong as the
           signee for this agreement ( A photocopy, directly made from the
           original which was witnessed and checked by Party B's representative,
           as one of the attachments presented herewith )

No.2 :     Full Power of Attorney granted by Largo Vista Group Ltd. to its
           representative Mr. Harold Rudolph McLendon as the signee for this
           agreement ( A photocopy, directly made from the original which was
           witnessed and checked by Party A's representative, as one of the
           attachments presented herewith )
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PARTY A : TIAN HAIHONG              (As the undersigned for and on behalf of
                                    shareholders with Full Power of Attorney,
                                    Legal Representative & Chairwoman of Jiahong
                                    Gas Co. Ltd. in Zunyi, Guizhou, China )

(Signature) _________________________________

PARTY B : LARGO VISTA GROUP, LTD. USA

THE UNDERSIGNED: HAROLD R. MCLENDON (For and on behalf of Largo Vista Group Ltd.
                                    with Full Power of Attorney )

(Signature)__________________________________

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