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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT

NOTE 3 – PROPERTY, PLANT AND EQUIPMENT

 

Property, plant and equipment consisted of the following:

 

  

December 31,

2018

  

December 31,

2017

 
Permit of land use  $409,612   $432,910 
Building   9,511,832    10,052,840 
Plant, machinery and equipment   26,576,409    28,044,515 
Motor vehicle   312,807    330,598 
Office equipment   198,292    200,974 
Total   37,008,952    39,061,837 
Less: accumulated depreciation   (17,714,573)   (15,520,834)
Property, plant and equipment, net  $19,294,379   $23,541,003 

 

Depreciation is computed on a straight-line basis over the estimated useful lives of the assets as follows:

 

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

 

Depreciation relating to office equipment was included in general and administrative expenses, while all other depreciation was included in cost of revenue. For the years ended December 31, 2018 and 2017, depreciation expense was $3,143,596 and $3,125,937, respectively.