FORM OF LOCK-UP AGREEMENT [Note: Each person subject to the Lock-Up Agreement will sign a separate agreement.]

Exhibit 10.3

FORM OF LOCK-UP AGREEMENT

[Note: Each person subject to the Lock-Up Agreement will sign a separate agreement.]

[Closing Date]

Golden Green Enterprises Limited

[Post-Closing Address]

Ladies and Gentlemen:

In connection with the Agreement of Merger and Plan of Reorganization dated _______, 2008 by and among China Opportunity Acquisition Corp. (“COAC”), Golden Green Enterprises Limited (“BVICo”), Wealth Rainbow Development Limited, Henan Green Complex Materials Co., Ltd and the shareholders of BVICo (the “Merger Agreement”), to induce COAC to consummate the Merger (as defined in the Merger Agreement), the undersigned agrees to, neither directly nor indirectly, during the “Restricted Period” (as hereinafter defined):

(1) sell or offer or contract to sell or offer, grant any option or warrant for the sale of, assign, transfer, pledge, hypothecate, or otherwise encumber or dispose of (all being referred to as a “Transfer”) any legal or beneficial interest in any Ordinary Shares of BVICo (“BVICo Shares”) issued to the undersigned [prior to the date hereof]⁽¹⁾ [in connection with the Merger]⁽²⁾ (the “Restricted Securities”), or

(2) enter into any swap or any other agreement or any transaction that transfers, in whole or in part, directly or indirectly, the economic consequence of ownership of any of the Restricted Securities, whether such swap transaction is to be settled by delivery of any Restricted Securities or other securities of any person, in cash or otherwise,

As used herein, “Restricted Period” means the period commencing on the Closing Date (as defined in the Stock Purchase Agreement) and ending on the day preceding [the first anniversary of the Closing Date]⁽³⁾ [the day this is six months after the Closing Date].⁽⁴⁾

It is understood that the BVI Shares owned by the undersigned and held in escrow pursuant to that certain Escrow Agreement (as defined in the Merger Agreement) shall be considered part of the “Restricted Securities” and shall, for purposes of calculating the number of Restricted Securities the undersigned is entitled to Transfer hereunder, be entirely included in that portion of the Restricted Securities that remain subject to the restrictions of this Agreement.⁽⁵⁾

Notwithstanding the foregoing limitations, this Lock-Up Agreement will not prevent any Transfer of any or all of the Restricted Securities, either during the undersigned’s lifetime or on the undersigned’s death, by gift, will or intestate succession, or by judicial decree, to the undersigned’s “family members” (as defined below) or to trusts, family limited partnerships and similar entities primarily for the benefit of the undersigned or the undersigned’s “family members”; provided, however, that in each and any such event it shall be a condition to the Transfer that the transferee execute an agreement stating that the transferee is receiving and holding the Restricted Securities subject to the provisions of this Lock-Up Agreement, and other than to return the Restricted Securities to the former ownership, there shall be no further Transfer of the Restricted Securities except in accordance with this Lock-Up Agreement. For purposes of this sub-paragraph, “family member” shall mean spouse, lineal descendants, stepchildren, father, mother, brother or sister of the transferor or of the transferor’s spouse. Also notwithstanding the foregoing limitations, in the event the undersigned is an entity rather than an individual, this Lock-Up Agreement will not prevent any Transfer of any or all of the

(1) For agreements signed by original BVICo shareholders.

(2) For agreements signed by COAC Insiders.

(3) For all shareholders other than Plumpton Group Limited and Honest Joy Group Limited.

(4) For Plumpton Group Limited and Honest Joy Group Limited.

(5) This paragraph will be only in agreement for Golden Green Enterprises Limited.

Restricted Securities to the shareholders of such entity, if it is a corporation, to the members of such entity, if it is a limited liability company, or to the partners in such entity, if it is a partnership; provided, however, that in each and any such event it shall be a condition to the Transfer that the transferee execute an agreement stating that the transferee is receiving and holding the Restricted Securities subject to the provisions of this Lock-Up Agreement, and other than to return the Restricted Securities to the former ownership, there shall be no further Transfer of the Restricted Securities in accordance with this Lock-Up Agreement.

Any of the Restricted Securities subject to this Lock-Up Agreement may be released in whole or part from the terms hereof only upon the approval of the Board of Directors of BVICo and a majority of the persons serving as directors of COAC immediately prior to the Merger.

The undersigned hereby authorizes BVICo’s transfer agent to apply to any certificates representing Restricted Securities issued to the undersigned the appropriate legend to reflect the existence and general terms of this Lock-up Agreement.

This Lock-up Agreement will be legally binding on the undersigned and on the undersigned’s heirs, successors, executors, administrators, conservators and permitted assigns, and is executed as an instrument governed by the law of New York.

Very truly yours,

[Signature]

              [Typed Name]

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