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7. ACCOUNTS PAYABLE AND ACCRUED EXPENSE (Tables)
12 Months Ended
Dec. 31, 2012
Payables and Accruals [Abstract]  
Accounts payable and accrued expenses
    As of December 31,  
    2012     2011  
             
Accounts payable   $ 3,797,552     $ 3,645,804  
Salary payable     190,926       132,454  
Social security insurance contribution payable     52,399       39,129  
Amount due to a contractor     -       1,422,042  
Price adjustment funds     1,758,828       1,031,685  
Other payables     733,531       1,102,529  
Total   $ 6,533,236     $ 7,373,643