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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

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