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Property, Plant and Equipment (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]    
Permit of land use $ 397,549 $ 403,755
Building 9,231,708 9,375,817
Plant, machinery and equipment 26,245,097 26,309,262
Motor vehicle 303,595 308,334
Office equipment 216,093 217,058
Total 36,394,042 36,614,226
Less: accumulated depreciation (20,625,801) (20,300,399)
Property and Equipment, net $ 15,768,241 $ 16,313,827