Promissory Note Issued To 2020 International Capital Group Limited

EXHIBIT 10.15

PROMISSORY NOTE

$80,000.00

Marlborough, Massachusetts

2020 CHINACAP ACQUIRCO, INC., a Delaware corporation (the " Maker" ) promises to pay to the order of 2020 INTERNATIONAL CAPITAL GROUP LIMITED, a Cayman Islands company (the " Payee" ) the principal sum of Eighty Thousand Dollars and No Cents ($80,000.00) in lawful money of the United States of America on the terms and conditions described below.

1. PRINCIPAL. All principal outstanding under this Note shall be due and payable on the earlier of (i) April 5, 2008 and (ii) the completion of an initial public offering of Maker' s equity securities.

2. INTEREST. The principal balance of this Note shall not bear interest.

3. APPLICATION OF PAYMENTS. All payments shall be applied first to payment in full of any costs incurred in the collection of any sum due under this Note, including (without limitation) reasonable attorneys' fees, then to the payment in full of any late charges and finally to the reduction of the unpaid principal balance of this Note.

4. EVENTS OF DEFAULT. The occurrence of any of the following events shall constitute an Event of Default:

(a) FAILURE TO MAKE REQUIRED PAYMENTS. Failure by Maker to pay the principal of this Note within five (5) business days following the date when due. (b) VOLUNTARY BANKRUPTCY, ETC. The commencement by Maker of a voluntary case under the Federal Bankruptcy Code, as now constituted or hereafter amended, or any other applicable federal or state bankruptcy, insolvency, reorganization, rehabilitation or other similar law, or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian, sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for the benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate action by Maker in furtherance of any of the foregoing.

(c) INVOLUNTARY BANKRUPTCY, ETC. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of Maker in an involuntary case under the Federal Bankruptcy Code, as now or hereafter constituted, or any other applicable federal or state bankru ...