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Trade Accounts and Bills Payable (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Trade Accounts and Bills Payable [Abstract]    
Trade accounts payable $ 10,801,796 $ 11,157,014
Bills payable    
Bank acceptance bills 3,883,077 3,915,094
Commercial acceptance bills
Trade accounts and bills payable $ 14,684,873 $ 15,072,108