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Trade Accounts and Bills Receivable, Net (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Trade Accounts and Bills Receivable, net [Abstract]    
Trade accounts receivable $ 33,305,997 $ 12,517,626
Less: Allowance for doubtful accounts (5,266,828) (4,650,686)
Trade accounts receivable, net 28,039,169 7,866,940
Bills receivable 1,532,105 85,480
Trade accounts and bills receivable, net $ 29,571,274 $ 7,952,420