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Prepayments and Other Current Assets (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Summary of prepayments and other current assets    
Prepaid land lease $ 333,964 $ 459,123
Prepayment for purchase of materials 2,871,244 183,649
Others 40,961 8,751
Total prepayments and other current assets $ 3,246,169 $ 651,523