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Loans (Details 1) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Collateral Amount $ 51,378,557 $ 57,521,579
Pledged deposits [Member]    
Collateral Amount 16,390,128 16,014,118
Prepaid land use rights [Member]    
Collateral Amount 7,589,504 7,446,117
Buildings [Member]    
Collateral Amount 17,813,978 17,501,902
Machinery and equipment [Member]    
Collateral Amount 9,355,930 10,206,100
Bills receivable [Member]    
Collateral Amount $ 229,017 $ 6,353,342