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PROPERTY, PLANT AND EQUIPMENT, NET
12 Months Ended
Dec. 31, 2012
PROPERTY, PLANT AND EQUIPMENT, NET  
PROPERTY, PLANT AND EQUIPMENT, NET

6. PROPERTY, PLANT AND EQUIPMENT, NET

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

 
  At December 31,
2011
  At December 31,
2012
 
 
  $
  $
 

Buildings

    150,147,460     166,300,361  

Leasehold improvements

    2,742,305     4,873,232  

Machinery

    413,079,111     422,895,433  

Furniture, fixtures and equipment

    26,397,638     34,611,157  

Motor vehicles

    2,908,260     3,023,309  
           

 

    595,274,774     631,703,582  

Less: Accumulated depreciation

    (122,078,346 )   (202,390,860 )
           

 

    473,196,428     429,312,722  

Construction in process

    36,873,008     40,330,100  
           

Property, plant and equipment, net

    510,069,436     469,642,822  
           

        Depreciation expense of property, plant and equipment was $30,946,035, $55,104,656 and $80,644,322 for the years ended December 31, 2010, 2011 and 2012, respectively. Construction in process represents production facilities under construction.