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Construction in Progress (Tables)
 12 Months Ended
Dec. 31, 2018
Construction in Progress [Abstract]  
Schedule of construction in progress
   December 31,   December 31, 
   2017   2018 
Construction in progress  $24,288,889   $23,562,557 
Prepayment for acquisition of property, plant and equipment   740,401    1,439,256 
Carrying amount  $25,029,290   $25,001,813