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Income taxes (Details 2) ¥ in Thousands, $ in Thousands | Dec. 31, 2018 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥)
--- | --- | --- | --- | ---
Tax losses | $ 975 |  | $ 958 |
Temporary differences | (17) |  | (6) |
Less: valuation allowances | (834) |  | (794) |
Net deferred tax assets | $ 124 |  | $ 158 |
ZHEJIANG TIANLAN |  |  |  |
Allowance for doubtful debts | ¥ |  | ¥ 13,201 |  | ¥ 6,269
Tax losses | ¥ |  | 1,037 |  | 0
Net deferred tax assets | ¥ |  | ¥ 14,238 |  | ¥ 6,269

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