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Prepayments and Other Current Assets (Tables)
3 Months Ended
Mar. 31, 2018
Prepayments and Other Current Assets [Abstract]  
Summary of prepayments and other current assets
  March 31,  December 31, 
  2018  2017 
Prepaid land lease $333,964  $459,123 
Prepayment for purchase of materials  2,871,244   183,649 
Others    40,961       8,751 
  $3,246,169  $651,523