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INTANGIBLE ASSETS, NET (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
INTANGIBLE ASSETS, NET |
Schedule of intangible assets |
As of December 31, 2012 |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |
--- | --- | --- | --- | --- | --- | --- | ---
|  | $ |  | $ |  | $ |
Technical know-how |  |  | 1,025,861 |  |  | (341,954 | ) |  | 683,907 |
Computer software |  |  | 5,634,986 |  |  | (1,991,289 | ) |  | 3,643,697 |
Total intangible assets, net |  |  | 6,660,847 |  |  | (2,333,243 | ) |  | 4,327,604 |
As of December 31, 2011 |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |
--- | --- | --- | --- | --- | --- | --- | ---
|  | $ |  | $ |  | $ |
Acquired power purchase agreements |  |  | 4,111,199 |  |  | (142,969 | ) |  | 3,968,230 |
Technical know-how |  |  | 1,023,354 |  |  | (213,199 | ) |  | 810,155 |
Computer software |  |  | 4,982,833 |  |  | (1,244,984 | ) |  | 3,727,849 |
Total intangible assets, net |  |  | 10,117,386 |  |  | (1,601,152 | ) |  | 8,516,234 |

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