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v3.20.1

Contract assets and liabilities (Details 1) ¥ in Thousands, $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 CNY (¥)
--- | --- | --- | --- | ---
Costs and estimated earnings on uncompleted contracts | $ 5,150 |  | $ 6,354 |
Less: billings to date | (5,578) |  | (6,825) |
Costs and estimated earnings on uncompleted contracts in excess of billings | (428) |  | (471) |
Unbilled revenue | 441 |  | 899 |
Deferred revenue | $ (869) |  | $ (1,370) |
ZHEJIANG TIANLAN |  |  |  |
Costs and estimated earnings on uncompleted contracts | ¥ |  | ¥ 433,195 |  | ¥ 236,044
Less: billings to date | ¥ |  | (352,234) |  | (135,050)
Costs and estimated earnings on uncompleted contracts in excess of billings | ¥ |  | ¥ 80,961 |  | ¥ 100,994

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