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v3.23.1

Contract assets and liabilities (Details 3) ¥ in Thousands, $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 CNY (¥)
--- | --- | --- | --- | ---
Costs and estimated earnings on uncompleted contracts | $ 750 |  | $ 228 |
Less: billings to date | (1,158) |  | (1,230) |
Costs incurred in contracts in process | 682 |  | 169 |
Estimated earnings | (408) |  | (1,002) |
Unbilled revenue | $ 217 |  | $ 74 |
ZHEJIANG TIANLAN |  |  |  |
Costs and estimated earnings on uncompleted contracts | ¥ |  | ¥ 688,184 |  | ¥ 503,434
Less: billings to date | ¥ |  | (645,695) |  | (468,605)
Unbilled revenue | ¥ |  | ¥ 42,489 |  | ¥ 34,829

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