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Other income (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Component of Operating Income [Abstract]
Government grants		¥ 247,416	¥ 88,488	¥ 88,873
Others		74,687	29,372	24,314
Total	$ 46,267	¥ 322,103	¥ 117,860	¥ 113,187

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No definition available.

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- Definition

The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.

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No definition available.

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- Definition

The amount of other government grants income.

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No definition available.

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- Definition

The amount of other income which are not separately disclosed on the income statement.

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No definition available.

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