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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Capital commitments:      
Commitments outstanding for the purchase of property, plant and equipment $ 222,700,000    
Lease commitments:      
Lease expense 38,633 $ 37,756 $ 31,076
2019 $ 11,279