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Prepayments and Other Current Assets (Tables)
 3 Months Ended
Mar. 31, 2020
Prepayments and Other Current Assets [Abstract]  
Schedule of prepayments and other current assets [Table Text Block]
   March 31,   December 31, 
   2020   2019 
Prepaid land lease  $169,370   $301,023 
Prepayment for purchase of materials   218,785    5,394,297 
Value-added tax recoverable   5,579,872    5,666,975 
Others   86,069    250,946 
   $6,054,096   $11,613,241