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Property, plant and equipment
12 Months Ended
Dec. 31, 2011
Property, plant and equipment

(6) Property, plant and equipment

 

As of December 31, 2011 and 2010, property, plant and equipment consisted of the following:

 

    December 31,     December 31,  
    2011     2010  
Property, Plant, and Equipment:                
Land use rights   $ 2,358,862     $ 2,266,282  
Building and improvements     11,145,342       7,283,466  
Machinery and equipment     122,844,563       64,913,451  
Vehicles     233,217       224,063  
Construction in progress     2,335,579       32,316,540  
      138,917,563       107,003,802  
Less accumulated depreciation and amortization     (24,266,456 )     (19,557,842 )
Property, Plant and Equipment, net   $ 114,651,107     $ 87,445,960  

 

Land use rights represent state-owned land located in China with lease terms of 50 years expiring in 2053.

 

 

Construction in progress mainly represents payments for the staff dormitory and canteen under construction.

 

Property, plant and equipment with net values of $10,646,244 and $4,928,033 have been pledged for short-term bank loans of HBOP as of December 31, 2011 and 2010, respectively. Depreciation and amortization of property, plant and equipment was $4,424,531, $4,147,777 and $3,510,082 during the years ended December 31, 2011, 2010 and 2009, respectively.