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Trade Accounts and Bills Payable (Tables)
 12 Months Ended
Dec. 31, 2019
Trade Accounts and Bills Payable [Abstract]  
Schedule of trade accounts and bills payable
   December 31,   December 31, 
   2018   2019 
Trade accounts payable  $23,134,269   $11,157,014 
Bills payable          
– Bank acceptance bills   28,911,556    3,915,094 
– Commercial acceptance bills   449,238    - 
   $52,495,063   $15,072,108