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Trade Accounts and Bills Payable (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Trade Accounts and Bills Payable [Abstract]    
Trade accounts payable $ 19,560,793 $ 11,157,014
Bills payable    
– Bank acceptance bills 8,791,499 3,915,094
Trade accounts and bills payable $ 28,352,292 $ 15,072,108