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Property, Plant and Equipment (Tables)
 9 Months Ended
Sep. 30, 2020
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
   September 30,   December 31, 
   2020   2019 
Permit of land use  $413,603   $403,755 
Building   9,604,495    9,375,817 
Plant, machinery and equipment   28,077,699    26,309,262 
Motor vehicle   315,854    308,334 
Office equipment   224,819    217,058 
Total   38,636,470    36,614,226 
Less: accumulated depreciation   (22,799,580)   (20,300,399)
Property, Plant and Equipment, net  $15,836,890   $16,313,827 
Schedule of depreciation is computed on straight-line basis over estimated useful lives of assets
Asset   Life - years  
Permit of land use  40 - 70  
Building  20 - 49  
Plant, machinery and equipment  5 - 10  
Motor vehicle  5 - 10  
Office equipment  3-5