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5. PROPERTY, PLANT AND EQUIPMENT, NET
6 Months Ended
Jun. 30, 2018
Property, Plant and Equipment [Abstract]  
5. PROPERTY, PLANT AND EQUIPMENT, NET

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

 

    June 30,
2018
  December 31,
2017
At cost:                
Mineral rights   $ 4,653,325       4,711,822  
Buildings     66,907,410       67,748,512  
Plant and machinery     205,294,156       200,742,652  
Motor vehicles     8,683       8,792  
Furniture, fixtures and office equipment     4,099,059       4,150,588  
Construction in process     1,358,535       183,036  
Total     282,321,168       277,545,402  
Less: Accumulated depreciation and amortization     (169,016,305 )     (163,597,407 )
Impairment     (18,475,881 )     (18,833,491 )
Net book value   $ 94,828,982     $ 95,114,504  

 

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. 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 $26,162,718 and $27,432,351 as at June 30, 2018 and December 31, 2017, respectively.

 

During the three-month period ended June 30, 2018, depreciation and amortization expense totaled $4,684,870, of which $4,420,180 and $262,689 were recorded in direct labor and factory overheads incurred during plant shutdown and administrative expenses, respectively. During the six-month period ended June 30, 2018, depreciation and amortization expense totaled $9,373,118, of which $8,857,147 and $515,971 were recorded in direct labor and factory overheads incurred during plant shutdown and administrative expenses, respectively.

 

During the three-month period ended June 30, 2017, depreciation and amortization expense totaled $5,294,777, of which $5,001,792 and $292,985 were recorded as cost of net revenue and administrative expenses, respectively. During the six-month period ended June 30, 2017, depreciation and amortization expense totaled $10,658,819, of which $10,074,234 and $584,585 were recorded as cost of net revenue and administrative expenses respectively.