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Trade Accounts and Bills Payable
 12 Months Ended
Dec. 31, 2020
Trade Accounts and Bills Payable [Abstract]  
Trade Accounts and Bills Payable
12. Trade Accounts and Bills Payable

 

Trade accounts and bills payable as of December 31, 2019 and 2020 consisted of the followings:

 

   December 31,   December 31, 
   2019   2020 
Trade accounts payable  $11,157,014   $19,560,793 
Bills payable          
– Bank acceptance bills   3,915,094    8,791,499 
           
   $15,072,108   $28,352,292 

 

All the bills payable are of trading nature and will mature within one year from the issue date.

 

The bank acceptance bills were pledged by the Company's bank deposits (Note 3).