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Earnings Per Share - Summary of Earnings Per Share (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) shares	Dec. 31, 2018 CNY (¥) shares	Dec. 31, 2017 CNY (¥) shares		Dec. 31, 2016 CNY (¥) shares
Earnings per share [abstract]
Profit attributable to ordinary equity holders of the parent	$ 103,925	¥ 695,266	¥ 888,809	[1]	¥ 525,177	[1]
Weighted average number of ordinary shares	40,858,290	40,858,290	40,764,569		40,016,808
Diluted effect of share options	0	0	0		0
Weighted average number of ordinary shares adjusted for effect of dilution	40,858,290	40,858,290	40,764,569		40,016,808
[1] Restated

X

- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

+ References

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- Definition

The number of dilutive potential ordinary shares that relate to the assumed exercise of the entity's share options.

+ References

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- Definition

The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

+ References

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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