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PREPAYMENT AND OTHER CURRENT ASSETS (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Advances to suppliers $ 4,745,727 $ 4,348,847
Prepayment for equipment purchase 2,435,068 2,300,415
Other prepaid expenses 107,720 64,739
Prepayment and other current assets $ 7,288,515 $ 6,714,001