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Property, Plant and Equipment (Tables)
 9 Months Ended
Sep. 30, 2025
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment

Property, plant and equipment consisted of the following:

 

   September 30,   December 31, 
   2025   2024 
Permit of land use  $396,407   $391,836 
Building   9,205,204    9,099,045 
Plant, machinery and equipment   27,206,451    26,835,227 
Motor vehicle   268,350    265,255 
Office equipment   396,209    390,434 
Total   37,472,621    36,981,797 
Less: accumulated depreciation   (32,970,142)   (32,098,396)
Property, plant and equipment, net  $4,502,479   $4,883,401 
Schedule of Estimated Useful Lives of the Assets

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