v3.25.1
Contract assets and liabilities (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CNY (¥)
Contract assets | $ $ 135   $ 66  
ZHEJIANG TIANLAN        
Contract assets | ¥   ¥ 66,644   ¥ 72,880
Unbilled revenue        
Contract assets | $ $ 135   $ 66  
Unbilled revenue | ZHEJIANG TIANLAN        
Contract assets | ¥   ¥ 66,644   ¥ 72,880