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v3.22.2.2

Intangible assets net (Details) - ZHEJIANG TIANLAN - CNY (¥) ¥ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Patents | ¥ 3,750 | ¥ 3,750
Others | 165 | 165
Intangible assets, gross | 3,915 | 3,915
Less: accumulated amortization | (2,050) | (1,795)
Intangible assets, net | ¥ 1,865 | ¥ 2,120

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