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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 24,388,254 $ 24,418,581
Adjustments to reconcile net income to net cash provided by operating activities:    
Interest on capital lease obligation 106,835  
Amortization of prepaid land leases 102,831 46,379
Depreciation and amortization 7,468,616 4,787,674
Write-off / Impairment loss on property, plant and equipment 7,570,566  
Stock-based compensation expense 3,169,000 1,188,966
Deferred tax asset (1,913,608) (21,445)
Changes in assets and liabilities:    
Accounts receivable (14,033,743) (10,055,752)
Inventories (405,227) 19,405
Prepayments and deposits 905,669 (682,423)
Other receivables (151,853)  
Accounts payable and accrued expenses 1,468,892 4,920,174
Taxes payable 697,706 3,320,663
Net cash provided by operating activities 29,373,938 27,942,222
CASH FLOWS USED IN INVESTING ACTIVITIES    
Additions of prepaid land leases (348,196) (50,940)
Purchase of property, plant and equipment (34,075,105) (20,283,022)
Increase in construction in progress (4,609,456) (551,699)
Net cash used in investing activities (39,032,757) (20,885,661)
CASH FLOWS PROVIDED BY FINANCING ACTIVITIES    
Proceeds from exercising stock options   18,000
Proceeds from private placement   2,192,919
Repurchase of common stock (348,147)  
Repayment of capital lease obligation (288,739)  
Advance from a related party   231,210
Net cash (used in)/provided by financing activities (636,886) 2,442,129
EFFECTS OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS 1,539,350 161,947
NET (DECREASE)/INCREASE IN CASH AND CASH EQUIVALENTS (8,756,355) 9,660,637
CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD 68,494,480 45,536,735
CASH AND CASH EQUIVALENTS - END OF PERIOD 59,738,125 55,197,372
Cash paid during the period for:    
Income taxes 10,341,857 6,157,079
Interest paid 1,121 226
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES    
Inception of capital lease obligation for acquiring property, plant and equipment 3,127,913  
Issuance of stock options to employees 2,717,000  
Issuance of warrants to non-employees 452,000  
Stock Option
    
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES    
Issuance of common stock 5  
Warrant
    
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES    
Issuance of common stock   8
Property Plant and Equipment
    
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES    
Issuance of common stock   $ 608,227