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PROPERTY, PLANT AND EQUIPMENT, NET (Tables)
9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment

Property, plant and equipment, net consist of the following:

 

   September 30,
2021
  December 31,
2020
At cost:          
Mineral rights  $2,973,716   $2,955,780 
Buildings   34,075,173    64,024,667 
Plant and machinery   236,574,630    258,400,710 
Motor vehicles   137,196    6,553 
Furniture, fixtures and office equipment   2,452,098    3,318,564 
Construction in process   24,696,439    12,095,565 
Total   300,909,252    340,801,839 
Less: Accumulated depreciation and amortization   (150,495,205)   (173,212,554)
     Impairment   —      (18,641,596)
Net book value  $150,414,047   $148,947,689