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4. PROPERTY, PLANT AND EQUIPMENT, NET
9 Months Ended
Sep. 30, 2019
Property, Plant and Equipment [Abstract]  
4. PROPERTY, PLANT AND EQUIPMENT, NET

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

 

    September 30,
2019
  December 31,
2018
At cost:                
Mineral rights   $ 2,726,661     $ 2,809,977  
Buildings     59,061,773       60,866,462  
Plant and machinery     231,460,194       161,178,816  
Motor vehicles     6,045       6,230  
Furniture, fixtures and office equipment     3,191,491       3,289,010  
Construction in process     1,188,268       6,535,808  
Total     297,634,432       234,686,303  
Less: Accumulated depreciation and amortization     (140,889,652)       (134,681,628 )
     Impairment     (17,196,587)       (17,722,045 )
Net book value   $ 139,548,193     $ 82,282,630  

 

The Company has certain buildings and salt pans erected on parcels of land located in Shouguang, PRC, and such parcels of land are collectively owned by local townships or the government authority. The Company has not been able to obtain property ownership certificates over these buildings and salt pans. The aggregate carrying values of these properties situated on parcels of the land are $19,881,983 and $20,409,998 as at September 30, 2019 and December 31, 2018, respectively.

 

During the three-month period ended September 30, 2019, depreciation and amortization expense totaled $3,632,805 of which $2,449,352, $201,182 and $982,271 were recorded in direct labor and factory overheads incurred during plant shutdown, administrative expenses and cost of net revenue. During the nine-month period ended September 30, 2019,depreciation and amortization expense totaled $10,530,985 of which $7,535,376, $648,456 and $2,347,153 were recorded in direct labor and factory overheads incurred during plant shutdown, administrative expenses and cost of net revenue.

 

During the three-month period ended September 30, 2018, depreciation and amortization expense totaled $4,601,338, of which $4,353,824 and $247,514 were recorded in direct labor and factory overheads incurred during plant shutdown and administrative expenses, respectively. During the nine-month period ended September 30, 2018, depreciation and amortization expense totaled $13,974,456, of which $13,210,971 and $763,485 were recorded in direct labor and factory overheads incurred during plant shutdown and administrative expenses, respectively.