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Related party transactions (Details Narrative) - ZHEJIANG TIANLAN | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2024 CNY (¥)
Investment |  | ¥ 4,469,000 | ¥ 4,708,000
Engineering Service |  |  |
Investment | $ 0 | 0 |
Remuneration | $ 2,037,000 | ¥ 1,878,000 |

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