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Property plant and equipment net (Details Narrative) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 CNY (¥)
--- | --- | --- | --- | ---
Property Plant And Equipment, Net | $ | $ 159,000 |  | $ 168,000 |
Property In Beijing, PRC Member |  |  |  |
Property Plant And Equipment, Net | $ | $ 76,000 |  | $ 80,000 |
ZHEJIANG TIANLAN |  |  |  |
Bank loans | ¥ |  | ¥ 777,000 |  | ¥ 1,026,000
Property Plant And Equipment, Net | ¥ |  | ¥ 57,738,000 |  | ¥ 63,505,000

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