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Income taxes (Details 2) ¥ in Thousands, $ in Thousands	Dec. 31, 2017 USD ($)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)
Tax losses	$ 958		$ 838
Temporary differences	(6)		(2)
Less: valuation allowances	(794)		(650)
Net deferred tax assets	$ 158		$ 186
ZHEJIANG TIANLAN
Tax losses | ¥		¥ 0		¥ 0
Allowance for doubtful debts | ¥		6,269		5,864
Net deferred tax assets | ¥		¥ 6,269		¥ 5,864

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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