**Exhibit      10.4**

**OPTION      AGREEMENT **

**(English      Translation)**

**.,**

**RECITALS**

| A. | Party                A is a company incorporated in PRC under the laws of the PRC, which                has                the technological expertise in natural gas industrial transportation                and                machinery ; |
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| B. | Party                B is a natural gas company with limited liability incorporated in                Xi’an,                Shanxi Province, China. |
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| C. | The                Chairman and the Shareholders are shareholders of Party B. The Chairman                and the Shareholders collectively own more than 50% of the outstanding                equity interest in Party B (each, an “Equity                Interest”                and collectively the “Equity                Interest”); |
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| D. | A                series of agreements such as the Consulting Services Agreement (the                “Service                Agreement”)                have been entered into between Party A and Party B concurrently with                this                Agreement; |
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| E. | An                Equity Pledge Agreement (the “Equity                Pledge Agreement”)                has been entered into by the Parties concurrently herewith; |
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| F. | The                Parties are entering into this Option Agreement in conjunction with                the                Pledge Agreement, Consulting Services Agreement and related agreements. |
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**NOW,      THEREFORE**

| 1. | Option                Grant  |
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|   | 1.1 | Grant                of Rights.                The Chairman and the Shareholders (hereafter collectively referred                to as                the “Transferor”)                hereby irrevocably grants to Party A an option to purchase or cause                any                person designated by Party A (“Designated                Persons”)                to purchase, to the extent permitted under PRC Law, according to                the steps                determined by Party A, at the price specified in Section 1.3 of this                Agreement, at any time from the Transferor a portion or all of the                equity                interests held by Transferor in Party B (the “Option”).                No option or similar right shall be granted by Transferor to any                third                party other than Party A and/or the Designated Persons. Party B hereby                agrees to the granting of the Option by The Chairman and the Shareholders                to Party A and/or the Designated Persons. The “person” set forth in this                clause and this Agreement means an individual, corporation, joint                venture,                partnership, enterprise, trust or a non-corporation organization. |
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|   | 1.2 | Exercise                of Rights.                According to the stipulations of PRC laws and regulations, Party                A and/or                the Designated Persons may exercise Option by issuing a written notice                (the “Notice”)                to the Transferor and specifying the equity interest purchased from                Transferor (the “Purchased                Equity Interest”)                and the manner of purchase. |
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|   | 1.3 | Purchase                Price. |
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|   | 1.3.1 | For                Party A to exercise the Option, the purchase price of the Purchased                Equity                Interest (“Purchase                Price”)                shall be equal to the original paid-in price of the Purchased Equity                Interest by the Transferor, unless the applicable PRC laws and regulations                require appraisal of the equity interests or stipulate other restrictions                on the purchase price of equity interests. |
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|   | 1.3.2 |  If                the applicable PRC laws require appraisal of the equity interests                or                stipulates other restrictions on the purchase price of the Equity                Interest                at the time that Party A exercise the Option, the Parties agree that                the                Purchase Price shall be set at the lowest price permissible under                the                applicable laws. |
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|   | 1.4 | Transfer                of the Purchased Equity Interest.                Upon each exercise of the Option rights under this                Agreement: |
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|   | 1.4.1 | Party                B shall convene a shareholders’ meeting upon request by the Transferor,                and Transferor agrees to call such meeting. During the meeting,                resolutions shall be proposed, approving the transfer of the appropriate                Equity Interest to Party A and/or the Designated Persons; |
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|   | 1.4.2 | The                Transferor shall, upon the terms and conditions of this Agreement                and the                Notice related to the Purchased Equity Interest, enter into Equity                Interest purchase agreement in a form reasonably acceptable to Party                A,                with Party A and/or the Designated Persons (as applicable); |
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|   | 1.4.3 | The                related parties shall execute all other requisite contracts, agreements                or                documents, obtain all requisite approval and consent of the government,                conduct all necessary actions, without any security interest, transfer                the                valid ownership of the Purchased Equity Interest to Party A and/or                the                Designated Persons, and cause Party A and/or the Designated Persons                to be                the registered owner of the Purchased Equity Interest. In this clause                and                this Agreement, “Security                Interest”                means any mortgage, pledge, the right or interest of the third party,                any                purchase right of equity interest, right of acquisition, right of                first                refusal, right of set-off, ownership detainment or other security                arrangements, however, it does not include any security interest                created                under the Equity Pledge Agreement. |
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|   | 1.5 | Payment.                The payment of the Purchase Price shall be determined by the consultation                of Party A and/or the Designated Persons with the Transferor according                to                the applicable laws at the time of exercise of the Option. |
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| 2. | Promises                Relating Equity Interest. |
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|   | 2.1 | Promises                Related to Party B.                Party B, the Chairman and the Shareholders hereby promise: |
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|   | 2.1.1 | Without                prior written consent by Party A, not, in any form, to supplement,                change                or renew the Articles of Association of Party B, to increase or decrease                registered capital of the corporation, or to change the structure                of the                registered capital in any other forms; |
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|   | 2.1.2 | According                to customary fiduciary standards applicable to managers with respect                to                corporations and their shareholders, to maintain the existence of                the                corporation, prudently and effectively operate the                business; |
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|   | 2.1.3 | Without                prior written consent by Party A, not, upon the execution of this                Agreement, to sell, transfer, mortgage or dispose, in any other form,                any                asset, legitimate or beneficial interest of business or income of                Party B,                or encumber or approve any encumbrance or imposition of any security                interest on Party A’s assets; |
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|   | 2.1.4 | Without                prior written notice by Party A, not issue or provide any guarantee                or                permit the existence of any debt, other than (i) the debt arising                from                normal or daily business but not from borrowing; and (ii) the debt                disclosed to Party A and obtained the written consent from Party                A; |
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|   | 2.1.5 | To                normally operate all business to maintain the asset value of Party                B,                without taking any action or failing to take any action that would                result                in a material adverse effect on the business or asset value of Party                B; |
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|   | 2.1.6 | Without                prior written consent by Party A, not to enter into any material                agreement, other than agreements in the ordinary course of business                (for                purposes of this paragraph, if the amount of the Agreement involves                an                amount that exceeds a hundred thousand Yuan (RMB 100,000) the agreement                shall be deemed material); |
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|   | 2.1.7 | Without                prior written consent by Party A, not to provide loan or credit loan                to                any others; |
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|   | 2.1.8 | Upon                the request of Party A, to provide all materials of operation and                finance                relevant to Party B to the extent they are in possession of such                materials; |
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|   | 2.1.9 | Purchase                and hold insurance from an insurance company acceptable to Party                A, and                the insurance amount and category shall be the same with those held                by the                companies in the same industry or field, operating the similar business                and owning the similar properties and assets as Party B; |
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|   | 2.1.10 | Without                prior written consent by Party A, not to cause Party B to merge or                associate with any person, or acquire or invest in any person; |
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|   | 2.1.11 | To                notify Party A of the occurrence or the potential occurrence of the                litigation, arbitration or administrative procedure related to the                assets,                business and income of Party B; |
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|   | 2.1.12 | To                cause Party B to maintain and preserve its assets, and to execute                all                requisite or appropriate documents, take all requisite or appropriate                actions, and pursue all appropriate claims, or make requisite or                appropriate pleas for all claims; |
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|   | 2.1.13 | Without                prior written notice by Party A, not to assign equity interests to                shareholders in any form; however, Party A shall distribute all or                part of                its distributable profits to their own shareholders upon request                by Party                A; |
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|   | 2.1.14 | According                to the request of Party A, to appoint any person designated by Party                A to                be the directors of Party B. |
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|   | 2.2 | Promises                Related to Transferor.                The Chairman and the Shareholders hereby promise: |
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|   | 2.2.1 | Without                prior written consent by Party A, not, upon the execution of this                Agreement, to sell, transfer, mortgage or dispose in any other form                any                legitimate or beneficial interest of equity interest, or to approve                any                other security interest set on it, with the exception of the pledge                set on                the equity interest of the Transferor subject to Equity Pledge Agreement; |
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|   | 2.2.2 | Without                the prior written notice by Party A, not to decide or support or                execute                any shareholder resolution at any shareholder meeting of Party B                that                approves any sale, transfer, mortgage or dispose of any legitimate                or                beneficial interest of equity interest, or allows any other security                interest set on it, other than the pledge on the equity interests                of                Transferor pursuant to Equity Pledge Agreement; |
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|   | 2.2.3 | Without                prior written notice by Party A, the Parties shall not agree or support                or                execute any shareholder resolution at any shareholder meeting of                Party B                that approves Party B’s merger or association with any person, acquisition                of any person or investment in any person; |
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|   | 2.2.4 | To                notify Party A the occurrence or the potential occurrence of the                litigation, arbitration or administrative procedure related to the                equity                interest owned by them; |
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|   | 2.2.5 | To                cause the Board of Directors of Party B to approve the transfer of                the                Purchased Equity Interest subject to this Agreement; |
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|   | 2.2.6 | In                order to keep its ownership of the equity interest, to execute all                requisite or appropriate documents, conduct all requisite or appropriate                actions, and make all requisite or appropriate claims, or make requisite                or appropriate defend against fall claims of compensation; |
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|   | 2.2.7 | Upon                the request of Party A, to appoint any person designated by Party                A to be                the directors of Party B; |
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|   | 2.2.8 | Upon                the request of Party A at any time, to transfer its Equity Interest                immediately to the representative designated by Party A unconditionally                at                any time and abandon its prior right of first refusal of such equity                interest transferring to another available shareholder; |
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|   | 2.2.9 | To                prudently comply with the provisions of this Agreement and other                Agreements entered into collectively or respectively by the Transferor,                Party B and Party A and perform all obligations under these Agreements,                without taking any action or any nonfeasance that sufficiently affects                the                validity and enforceability of these Agreements; |
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| 3. | Representations                and Warranties.                As of the execution date of this Agreement and every transferring                date,                Party B, the Chairman and the Shareholders hereby jointly and severally                represent and warrant collectively and respectively to Party A as                follows: |
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|   | 3.1 | It                has the power and ability to enter into and deliver this Agreement,                and                any equity interest transferring Agreement (“Transferring                Agreement,”                respectively) having it as a party, for every single transfer of                the                Purchased Equity Interest according to this Agreement, and to perform                its                obligations under this Agreement and any Transferring Agreement.                Upon                execution, this Agreement and the Transferring Agreements having                it as a                party will constitute a legal, valid and binding obligation of it                enforceable against it in accordance with its terms; |
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|   | 3.2 | To                its knowledge and without independent verification, the execution,                delivery of this Agreement and any Transferring Agreement and performance                of the obligations under this Agreement and any Transferring Agreement                will not: (i) cause to violate any relevant laws and regulations                of PRC;                (ii) constitute a conflict with its Articles of Association or other                organizational documents (if an entity); (iii) cause to breach any                Agreement or instruments to which it is a party or having binding                obligation on it, or constitute the breach under any Agreement or                instruments to which it is a party or having binding obligation on                it;                (iv) cause to violate relevant authorization of any consent or approval                to                it and/or any continuing valid condition; or (v) cause any consent                or                approval authorized to it to be suspended, removed, or into which                other                requests be added; |
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|   | 3.3 | The                shares of Party B are transferable, and Party B has not permitted                or                caused any security interest to be imposed upon the shares of Party                B. |
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|   | 3.4 | Party                B does not have any unpaid debt, other than (i) debt arising from                its                normal business; and (ii) debt disclosed to Party A and obtained                by                written consent of Party A; |
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|   | 3.5 | Party                B has complied with all PRC laws and regulations applicable to the                acquisition of assets and securities in connection with this Agreement; |
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|   | 3.6 | No                litigation, arbitration or administrative procedure relevant to the                Equity                Interests and assets of Party B or Party B itself is in process or                to be                settled and the Parties have no knowledge of any pending or threatened                claim; |
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|   | 3.7 | The                Transferor bears the fair and salable ownership of its Equity Interest                free of encumbrances of any kind, other than the security interest                pursuant to the Equity Pledge Agreement. |
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| 4. | Assignment                of Agreement  |
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|   | 4.1 | Party                B, the Chairman and the Shareholders shall not transfer their rights                and                obligations under this Agreement to any third party without the prior                written consent of the Party A. |
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|   | 4.2 | Party                B, the Chairman and the Shareholders hereby agree that Party A shall                be                able to transfer all of its rights and obligation under this Agreement                to                any third party with its needs, and such transfer shall only be subject                to                a written notice sent to Party B, the Chairman and the Shareholders                by                Party A, and no any further consent from Party B, the Chairman and                the                Shareholders will be required. |
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| 5. | Termination. Party                A shall have the right to terminate this Agreement at any time by                issuing                a thirty (30) days prior written notice to Party B, except in the                event                where Party A has transferred its rights and obligations in accordance                with Section 4.2 of this Agreement. |
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| 6. | Applicable                Law and Dispute Resolution |
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|   | 6.1 | Applicable                Law.                The execution, validity, construing and performance of this Agreement                and                the resolution of disputes under this Agreement shall be governed                by the                laws of PRC. |
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|   | 6.2 | Dispute                Resolution.                The parties shall strive to settle any dispute arising from the                interpretation or performance in connection with this Agreement through                friendly consultation. In case no settlement can be reached through                consultation within thirty (30) days after such dispute is raised,                each                party can submit such matter to China International Economic and                Trade                Arbitration Commission (the “CIETAC”)                in accordance with its rules. Arbitration shall take place in Beijing                and                the proceedings shall be conducted in Chinese. Any resulting arbitration                award shall be final conclusive and binding upon both                parties. |
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| 7. | Taxes                and Expenses.                Each Party shall, according to the PRC laws, bear any and all registering                taxes, costs and expenses for equity transfer arising from the preparation                and execution of this Agreement and all Transferring Agreements,                and the                completion of the transactions under this Agreement and all Transferring                Agreements. |
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| 8. | Notices.                Notices or other communications required to be given by any party                pursuant                to this Agreement shall be written in English and Chinese and delivered                personally or sent by registered mail or postage prepaid mail or                by a                recognized courier service or by facsimile transmission to the address                of                relevant each party or both parties set forth below or other address                of                the party or of the other addressees specified by such party from                time to                time. The date when the notice is deemed to be duly served shall                be                determined as the follows: (a) a notice delivered personally is deemed                duly served upon the delivery; (b) a notice sent by mail is deemed                duly                served the tenth (10th)                day after the date when the air registered mail with postage prepaid                has                been sent out (as is shown on the postmark), or the fourth (4th)                day after the delivery date to the internationally recognized courier                service agency; and (c) a notice sent by facsimile transmission is                deemed                duly served upon the receipt time as is shown on the transmission                confirmation of relevant documents. |
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|                        |         |                                                                                                                                                |
|-----------------------------|--------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|
| **Party                A:** |    | **Shaanxi                Xilan Natural Gas Equipment Co.,Ltd.**                                                                                     |
| Address:                    |    | 3th                Floor, No.6 Xianmen Road                                                                                                    |
|                        |         | Xi'an                Lantian County,Xi’an                Shaanxi Province, China (710065)                                                     |
| Fax:                        |    | (029)                88319221                                                                                                                       |
| Phone:                      |    | (029)                88350968                                                                                                                       |
|                        |         |
| **Party                B:** |    | **Xi'an                Xilan Natural Gas Co, Ltd.**                                                                                                 |
| Address:                    |    | 19th                floor,  Van Metropolis B,Tangyan                RD,Hi-techZone,Xi’an,                Shanxi Province, China (710065) |
| Fax:                        |         | (029)                88454352                                                                                                                       |
| Phone:                      |         | (029)                88323325                                                                                                                       |
|                        |         |
| **Chairman:**               |    | To                the address printed on the signature page hereto.                                                                                 |
|                        |         |
| **Shareholders:**           |    | To                the respective addresses printed on the signature pages                hereto.                                                    |
|                        |    |                                                                                                                                                |

| 9. | Confidentiality.                The Parties acknowledge and confirm any oral or written materials                exchanged by the Parties in connection with this Agreement are                confidential. The Parties shall maintain the secrecy and confidentiality                of all such materials. Without the written approval by the other                Parties                (except that written approval of the Shareholders shall not be required),                any Party shall not disclose to any third party any relevant materials,                but the following circumstances shall be                excluded: |
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|   | 9.1 | The                materials that is known or may be known by the general public (but                not                include the materials disclosed by each party receiving the materials); |
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|   | 9.2 | The                materials required to be disclosed subject to the applicable laws                or the                rules or provisions of stock exchange; or |
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|   | 9.3 | The                materials disclosed by each Party to its legal or financial consultant                relating the transaction of this Agreement, and this legal or financial                consultant shall comply with the confidentiality set forth in this                Section. The disclosure of the confidential materials by staff or                employed                institution of any Party shall be deemed as the disclosure of such                materials by such Party, and such Party shall bear the liabilities                for                breaching the contract. This clause shall survive whatever this Agreement                is invalid, amended, revoked, terminated or unable to implement by                any                reason. |
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| 10. | Further                Warranties.                The Parties agree to promptly execute documents reasonably required                to                perform the provisions and the aim of this Agreement or documents                beneficial to it, and to take actions reasonably required to perform                the                provisions and the aim of this Agreement or actions beneficial to                it. |
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| 11. | Miscellaneous. |
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|   | 11.1 | Amendment,                Modification and Supplement.                Any amendment and supplement to this Agreement shall only be effective                is                made by the Parties in writing. |
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|   | 11.2 | Entire                Agreement.                Notwithstanding the Article 5 of this Agreement, the Parties acknowledge                that this Agreement constitutes the entire agreement of the Parties                with                respect to the subject matters therein and supercede and replace                all prior                or contemporaneous agreements and understandings in verb or/and in                writing. |
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|   | 11.3 | Severability.                If any provision of this Agreement is judged as invalid or non-enforceable                according to relevant Laws, the provision shall be deemed invalid                only                within the applicable laws and regulations of the PRC, and the validity,                legality and enforceability of the other provisions hereof shall                not be                affected or impaired in any way. The Parties shall, through fairly                consultation, replace those invalid, illegal or non-enforceable provisions                with valid provisions that may bring the similar economic effects                with the                effects caused by those invalid, illegal or non-enforceable provisions. |
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|   | 11.4 | Headings.                The headings contained in this Agreement are for the convenience                of                reference only and shall not affect the interpretation, explanation                or in                any other way the meaning of the provisions of this Agreement. |
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|   | 11.5 | Language                and Copies.                This Agreement is written in both English and Chinese language and                has                been executed in English in duplicate originals; each Party holds                one (1)                original and each duplicate original shall have the same legal effect.                In                the event there is any conflict between the Chinese Version and English                Version, the English version shall                prevail. |
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|   | 11.6 | Successor.                This Agreement shall bind and benefit the successor of each Party                and the                transferee allowed by each Party. |
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|   | 11.7 | Survival.                Any obligation taking place or at term hereof prior to the end or                termination ahead of the end of this Agreement shall continue in                force and                effect notwithstanding the occurrence of the end or termination ahead                of                the end of the Agreement. Article 6, Article 8, Article 9 and Section                11.7                hereof shall continue in force and effect after the termination of                this                Agreement. |
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|   | 11.8 | Waiver.                Any Party may waive the terms and conditions of this Agreement in                writing                with the signature of the Parties. Any waiver by a Party to the breach                by                other Parties within certain situation shall not be construed as                a waiver                to any similar breach by other Parties within other situations. |
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**IN      WITNESS WHEREOF**

**PARTY      A:**

|                                                          |   |   |   |
|---------------------------------------------------------------|--------|--------|--------|
| **Shaanxi Xilan Natural Gas Equipment              Co.,Ltd.** |   |   |   |
|                                                          |   |   |   |
| By:/s/              Qinan Ji                                  |   |   |   |
|                                                               |   |   |        |
| Name: Qinan              Ji                                   |   |   |        |
|                                                          |   |   |   |

**PARTY      B: **

|                             |   |   |   |
|----------------------------------|--------|--------|--------|
| Xi'an Xilan Natural Gas Co, Ltd. |   |   |   |
|                             |   |   |   |
| By:/s/                Qinan Ji   |   |   |   |
|                                  |   |   |        |
| Name: Qinan                Ji    |   |   |        |
|                             |

**CHAIRMAN:**

|                        |   |   |   |
|-----------------------------|--------|--------|--------|
| /s/ Qinan Ji                |   |   |   |
| Qinan                    Ji |   |   |        |
|                             |   |   |        |
|                        |

| **SHAREHOLDERS:** |   |   |   |
|-------------------|--------|--------|--------|
|              |   |   |   |
|              |   |   |   |

| By:                     /s/ Qinan Ji |   |   |  |
|-------------------------------------------|--------|--------|--|
| Name:                     QINAN JI   |   |   |  |
|                                           |   |   |  |

| By:                       /s/ Mingshan Han |   |   |  |
|-------------------------------------------------|--------|--------|--|
| Name:                       MINGSHAN HAN   |   |   |  |
|                                                 |   |   |  |

| By:                                   /s/ Liyin Shi |   |   |  |
|----------------------------------------------------------|--------|--------|--|
| Name:                                   LIYIN SHI   |   |   |  |
|                                                          |   |   |  |

| By:                                 /s/ Shaohu Jia |   |   |  |
|---------------------------------------------------------|--------|--------|--|
| Name:                                 SHAOHU JIA   |   |   |  |
|                                                         |   |   |  |

| By:                                   /s/ Yuai She |   |   |  |
|---------------------------------------------------------|--------|--------|--|
| Name:                                   YUAI SHE   |   |   |  |
|                                                         |   |   |  |

| By:                                     /s/ Xinmin Han |   |   |  |
|-------------------------------------------------------------|--------|--------|--|
| Name:                                     XINMIN HAN   |   |   |  |
|                                                             |   |   |  |

| By:                                     /s/ Jiaoyin Shi |   |   |  |
|--------------------------------------------------------------|--------|--------|--|
| Name:                                     JIAOYIN SHI   |   |   |  |
|                                                              |   |   |  |

| By:                                 /s/ Xiang Ji |   |   |  |
|-------------------------------------------------------|--------|--------|--|
| Name:                                 XIANG JI   |   |   |  |
|                                                       |   |   |  |

| By:                               /s/ Xiaoli Jia |   |   |  |
|-------------------------------------------------------|--------|--------|--|
| Name:                               XIAOLI JIA   |   |   |  |
|                                                       |   |   |  |

| By:                                 /s/ Shengming Li |   |   |  |
|-----------------------------------------------------------|--------|--------|--|
| Name:                                 SHENGMING LI   |   |   |  |
|                                                           |   |   |  |

| By:                             /s/  Xingiao Han |   |   |  |
|------------------------------------------------------------|--------|--------|--|
| Name:                             XINGIAO HAN         |   |   |  |
|                                                            |   |   |  |

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