Number of employees granted awards under the stock based compensation plan of the entity.

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Represents the change in the aggregate fair value of the liability amount of the redemption right of the awardees of vested awards in a stock based compensation arrangement.

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No definition available.

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Represents the change in the aggregate fair value of the liability amount of the redemption right of the awardees of vested awards in a stock based compensation arrangement.

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No definition available.

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Aggregate repurchase price of vested share based awards upon the occurrence of certain contingent events which are considered outside the entity's control.

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No definition available.

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Amount per share or per unit of equity securities to repurchase vested awards in a share-based compensation plan.

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No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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SHARE-BASED COMPENSATION - 2011 SHARE AWARD SCHEME (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands		12 Months Ended
	May. 26, 2011 USD ($) shares	Dec. 31, 2015 USD ($) employee $ / shares shares	Dec. 31, 2015 CNY (¥) employee shares	Dec. 31, 2014 $ / shares shares	Dec. 31, 2014 CNY (¥) shares	Dec. 31, 2013 CNY (¥)	Dec. 31, 2015 CNY (¥) ¥ / shares shares
Other disclosures
Share-based compensation expenses		$ 48,690,000	¥ 315,407		¥ 173,274	¥ 37,396
2011 Share Award Scheme
SHARE-BASED COMPENSATION
Award scheme term	10 years
Aggregate consideration to repurchase vested shares \| $	$ 1,000
Shares available to be granted in the future		1,273,840		5,270,620	5,270,620		1,273,840
Other disclosures
Share-based compensation expenses		$ 11,197,000	¥ 72,535		¥ 41,259	35,527
2011 Share Award Scheme \| Maximum
SHARE-BASED COMPENSATION
Number of shares subject to award	100,000,000
2011 Share Award Scheme \| Restricted shares
Number of ordinary shares
Unvested at beginning of year		38,398,753	38,398,753
Number of restricted shares granted		6,380,530	6,380,530
Vested		(20,192,560)	(20,192,560)
Forfeited		(2,383,750)	(2,383,750)
Unvested at end of year		22,202,973	22,202,973		38,398,753
Weighted average grant date fair value
Unvested at beginning of year (in dollars per share) \| $ / shares		$ 0.55
Granted (in dollars per share) \| $ / shares		1.91
Vested (in dollars per share) \| $ / shares		0.36
Forfeited (in dollars per share) \| $ / shares		0.63
Unvested at end of year (in dollars per share) \| $ / shares		$ 1.11		$ 0.55
Other disclosures
Unrecognized compensation costs		$ 10,587,000					¥ 68,582
Expected period over which unamortized compensation costs is to be recognized		1 year 11 months 1 day	1 year 11 months 1 day
Total fair value of vested shares		$ 46,577,000	¥ 301,715		¥ 243,214	¥ 74,962
2011 Share Award Scheme \| Restricted shares with repurchase options
SHARE-BASED COMPENSATION
Repurchase price of vested shares (in dollar pers share) \| ¥ / shares							¥ 4
Redemption right liability		73,000	474		¥ 520
Change in fair value of redemption right recorded as share-based compensation costs.		4,000	24
Other disclosures
Share-based compensation expenses		$ 3,000	¥ 22
2011 Share Award Scheme \| Restricted shares with repurchase options \| Maximum
SHARE-BASED COMPENSATION
Requisite service period		4 years	4 years
2011 Share Award Scheme \| Restricted shares with repurchase options \| Minimum
SHARE-BASED COMPENSATION
Requisite service period		1 year	1 year
2011 Share Award Scheme \| Restricted shares with repurchase options \| Employees
SHARE-BASED COMPENSATION
Number of employees \| employee		2	2
Number of ordinary shares
Number of restricted shares granted		3,000,000	3,000,000