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Income taxes (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 CNY (¥)
Profit/(loss before) income taxes/(benefit): The PRC and Hong Kong | $ | $ (963) |  | $ (564) |  | $ (640) |
The provision / (credit) for income taxes consist of: |  |  |  |  |  |
Current tax expenses: The PRC and Hong Kong | $ | (346) |  | 0 |  | 212 |
Total current provision / (credit) | $ | (346) |  | 0 |  | 212 |
Deferred tax expenses: The PRC and Hong Kong | $ | 34 |  | 28 |  | 16 |
Total deferred provision | $ | 34 |  | 28 |  | 16 |
Income taxes credit / (expense) | $ | $ (312) |  | $ 28 |  | $ 228 |
ZHEJIANG TIANLAN |  |  |  |  |  |
Profit/(loss before) income taxes/(benefit): The PRC and Hong Kong | ¥ |  | ¥ (34,194) |  | ¥ 30,047 |  | ¥ 27,603
The provision / (credit) for income taxes consist of: |  |  |  |  |  |
Current PRC EIT Domestic | ¥ |  | 2 |  | 4,237 |  | 6,298
Total current provision / (credit) | ¥ |  | 2 |  | 4,237 |  | 6,298
Deferred tax benefit | ¥ |  | (7,969) |  | (405) |  | (1,337)
Total deferred provision | ¥ |  | (7,969) |  | (405) |  | (1,337)
Income taxes credit / (expense) | ¥ |  | ¥ (7,967) |  | ¥ 3,832 |  | ¥ 4,961

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