v3.25.1
Accounts receivable 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 (¥)
Balance at beginning of period | $ $ 0   $ 28  
Less: write-off of doubtful accounts | $ 0   (28)  
Balance at end of period | $ $ 0   $ 0  
ZHEJIANG TIANLAN        
Balance at beginning of period   ¥ 29,644   ¥ 40,019
Add: provision for allowances   6,304   10,376
Less: reversal of provision for doubtful accounts   0   (677)
Less: write-off of doubtful accounts   0   (20,074)
Balance at end of period   ¥ 35,952   ¥ 29,644