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v3.23.1

Contract assets and liabilities (Details 4) ¥ in Thousands, $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 CNY (¥)
--- | --- | --- | --- | ---
Unbilled revenue | $ | $ 217 |  | $ 74 |
Deferred revenue | $ | (625) |  | (1,076) |
Estimated earnings | $ | (408) |  | (1,002) |
Contract assets, net | $ | $ 217 |  | $ 74 |
ZHEJIANG TIANLAN |  |  |  |
Deferred revenue | ¥ |  | ¥ (34,503) |  | ¥ (37,481)
Gross contract assets | ¥ |  | 89,440 |  | 81,198
Less: allowance for doubtful accounts | ¥ |  | 12,448 |  | 8,888
Contract assets, net | ¥ |  | ¥ 76,992 |  | ¥ 72,310

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