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Other income and other losses (Details 1) - ZHEJIANG TIANLAN - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Impairment loss on short term investments | ¥ 0 | ¥ 0 | ¥ 195
Impairment loss on contract assets | 0 | 0 | 3,560
Other losses | ¥ 0 | ¥ 0 | ¥ 3,755

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