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v3.22.2.2

Property plant and equipment net (Details 1) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥)
Depreciation charge | $ | $ 38 |  | $ 49 |  | $ 69 |
ZHEJIANG TIANLAN |  |  |  |  |  |
Depreciation charge | ¥ |  | ¥ 6,466 |  | ¥ 6,359 |  | ¥ 6,556

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