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Short-term and long-term investments (Details Narrative) - CNY (¥) | Dec. 31, 2024 | Dec. 31, 2023
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ZHEJIANG TIANLAN |  |
Other Ownership Interests | ¥ 53,292,000 | ¥ 0

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- Definition The amount of capital contributed by other unit holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5 + Details
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