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Prepaid land lease payments (Land use right) | 12 Months Ended
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Dec. 31, 2013
Land use right |
Prepaid land lease payments |
Prepaid land lease payments | 7. Prepaid land lease payments
|  | December 31, |  | December 31, |
|  | 2012 |  | 2013 |
Prepaid land lease payments |  | $ | 11,891 |  | $ | 12,238 |
Less: accumulated amortization |  | 979 |  | 1,290 |
Net carrying value |  | $ | 10,912 |  | $ | 10,948 |
Amortization expenses for prepaid land lease payments for the years ended December 2011, 2012 and 2013 were $285, $299 and $311, respectively.

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