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Property, plant and equipment, net (Tables)
9 Months Ended
Sep. 30, 2012
Property, plant and equipment, net [Abstract]  
Schedule of Plant and Equipment, Net
    September 30,     December 31,  
    2012     2011  
    (Unaudited)        
    $     $  
Cost                
Construction in progress     687,287       14,016,485  
Furniture, fixtures and office equipment     3,010,510       2,734,321  
Leasehold improvement     98,615       98,305  
Machinery and equipment     15,203,124       13,429,090  
Motor vehicles     1,305,719       1,225,948  
Building     18,141,223       268,717  
      38,446,478       31,772,866  
Less: accumulated depreciation     7,491,032       6,310,210  
                 
      30,955,446       25,462,656