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3. Other income, net (Details) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2012 ZHEJIANG CNY | Dec. 31, 2011 ZHEJIANG CNY | Dec. 31, 2010 ZHEJIANG CNY
Exchange (loss)/gain, net | $ (17) | $ 26 | $ (17) |  |  |  |  |  |
Rental income | 65 | 56 | 26 |  |  |  |  |  |
Subsidy income (note i) |  |  |  | 7,170 | [1] | 4,483 | [1] | 5,954 | [1]
Sales of scrapped materials |  |  |  | 31 |  | 78 |  | 0 |
Others |  |  |  | 140 |  | 600 |  | 120 |
Total | $ 48 | $ 82 | $ 9 | 7,341 |  | 5,161 |  | 6,074 |
[1] | (i) The Group recognises subsidy income for R&D projects when granted by institutions and are not probably to be returned or reimbursed.

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