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v3.21.1

Property, plant and equipment, net (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥)
Office premises | $ |  |  | $ 673 |  | $ 1,866 |
Leasehold improvements | $ |  |  | 157 |  | 155 |
Furniture, fixtures and office equipment | $ |  |  | 557 |  | 511 |
Motor vehicles | $ |  |  | 175 |  | 173 |
Testing equipment | $ |  |  | 37 |  | 37 |
Property, plant and equipment, gross | $ |  |  | 1,599 |  | 2,742 |
Less: accumulated depreciation and amortization | $ |  |  | (1,340) |  | (2,042) |
Net | $ |  |  | $ 259 |  | $ 700 |
ZHEJIANG TIANLAN |  |  |  |  |  |
Building and leasehold improvements | ¥ |  |  |  | ¥ 167,874 |  | ¥ 167,874
Furniture, fixtures and office equipment | ¥ |  |  |  | 3,658 |  | 3,543
Motor vehicles | ¥ |  |  |  | 4,808 |  | 4,808
Plant and machineries | ¥ |  |  |  | 9,399 |  | 8,937
Property, plant and equipment, gross | ¥ |  |  |  | 185,739 |  | 185,162
Less: accumulated depreciation and amortization | ¥ |  |  |  | (70,241) |  | (63,881)
Less: accumulated impairment losses | ¥ | ¥ (36,241) | ¥ (33,500) |  |  |  |
Net | ¥ |  |  |  | ¥ 79,257 |  | ¥ 87,781

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