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Construction in Progress (Tables)
 3 Months Ended
Mar. 31, 2017
Schedule of Construction in Progress [Table Text Block]
 

 

   December 31,     March 31,  
 

 

   2016     2017  
 

Construction in progress

 $ 33,277,338   $ 32,989,048  
 

Prepayment for acquisition of property, plant and equipment

   179,705     65,859  
 

Carrying amount

 $ 33,457,043   $ 33,054,907