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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 3,287,107 $ 14,364,999
Adjustments to reconcile net income to net cash provided by operating activities:    
Interest on capital lease obligation 54,020 41,715
Amortization of prepaid land leases 54,871 29,842
Depreciation and amortization 5,683,163 3,348,519
Exchange loss on inter-company balances 24,322  
Stock-based compensation expense 15,300 3,138,000
Deferred tax asset 78,204 7,888
Changes in assets and liabilities:    
Accounts receivable (5,325,631) (5,750,002)
Inventories (323,846) 898,399
Prepayments and deposits (56,325) 787,313
Accounts payable and accrued expenses 362,206 2,502,453
Retention payable (15,458)  
Taxes payable (523,983) 2,372,754
Net cash provided by operating activities 3,313,950 21,741,880
CASH FLOWS USED IN INVESTING ACTIVITIES    
Additions of prepaid land leases (109,076) (24,760)
Purchase of property, plant and equipment   (3,038,000)
Net cash used in investing activities (109,076) (3,062,760)
EFFECTS OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS 86,483 771,565
NET INCREASE IN CASH AND CASH EQUIVALENTS 3,291,357 19,450,685
CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD 78,576,060 68,494,480
CASH AND CASH EQUIVALENTS - END OF PERIOD 81,867,417 87,945,165
Cash paid during the period for:    
Income taxes 1,689,197 4,335,981
Interest paid      
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES    
Inception of capital lease obligation for acquiring property, plant and equipment   $ 3,127,913