v3.25.1
Property plant and equipment net (Details 1)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CNY (¥)
Depreciation charge | $ $ 14   $ 15   $ 33  
ZHEJIANG TIANLAN            
Depreciation charge | ¥   ¥ 6,175   ¥ 5,964   ¥ 6,580