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Trade Accounts and Bills Receivable, Net (Details 1) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Trade Accounts and Bills Receivable, net [Abstract]    
Balance at beginning of period $ 3,657,173  
Provision for the period 605,098 $ 474,950
Reversal - recoveries by cash (281,160) (312,462)
Charged to consolidated statements of operations and comprehensive (loss) income 323,938 162,488
Foreign exchange adjustment 2,939 (206,237)
Balance at end of period $ 3,984,050 $ 3,657,173