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PREPAID EXPENSE AND OTHER CURRENT ASSETS (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
PREPAID EXPENSE AND OTHER CURRENT ASSETS [Abstract]    
Spare parts $ 6,264,805 $ 3,975,860
Prepaid Value added tax ("VAT") 13,546,880 18,705,984
Prepaid insurance fee 1,016,625 471,721
Others 3,042,380 780,402
Total $ 23,870,690 $ 23,933,967