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Dividends Declared and Paid - Summary of Dividends Declared and Paid (Detail) ¥ in Thousands, $ in Thousands					12 Months Ended
	Jul. 13, 2017 CNY (¥)	Jul. 13, 2017 USD ($)	Jun. 29, 2016 CNY (¥)	Jun. 29, 2016 USD ($)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Disclosure of dividends declared and paid on ordinary capital [Abstract]
Dividend paid in cash		$ 34,700		$ 17,800	¥ 235,947	$ 37,278	¥ 118,193
Dividend paid in shares (Note 24)	¥ 12,897	$ 2,038	¥ 103,356		12,897	2,038	103,356
Dividends on ordinary shares					¥ 248,844	$ 39,316	¥ 221,549	¥ 257,500

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- Definition

Disclosure of dividends declared and paid on ordinary capital abstract.

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No definition available.

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- Definition

Dividends paid in cash.

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No definition available.

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- Definition

Dividends paid in ordinary shares value.

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No definition available.

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- Definition

The amount of dividends paid by the entity on ordinary shares. [Refer: Ordinary shares [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 34
-IssueDate 2016-01-13
-Paragraph 16A
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=34&date=2016-03-30&anchor=para_16A_f&doctype=Standard
-URIDate 2016-03-31

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