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SHARE-BASED AWARDS (Tables) | 12 Months Ended
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Dec. 31, 2017
Schedule of Assumptions Used |
|  | February 18, 2014 |
Risk-free interest rate |  |  | 2.33 | %
Dividend yield |  |  | 5 | %
Exercise multiple |  |  | 2.5 |
Expected volatility range |  |  | 39.03 | %
Schedule of Stock Options |
Share Options Granted to Employees |  | Number of Shares |  | Weighted- Average Exercise Price |  | Weighted Average Grant-date Fair Value |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value |
Outstanding, January 1, 2017 |  |  | 7,459,046 |  | US$ | 2.98 |  | US$ | 0.72 |  |  | 5.74 |  |  | — |
Granted |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Exercised |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Forfeited |  |  | (4,241,959) |  | US$ | 1.37 |  | US$ | 0.65 |  |  | 0.13 |  |  | — |
Outstanding, December 31, 2017 |  |  | 3,217,087 |  | US$ | 5.11 |  | US$ | 0.81 |  |  | 13.13 |  |  | — |
Expected to vest, December 31, 2017 |  |  | 3,217,087 |  | US$ | 5.11 |  | US$ | 0.81 |  |  | 13.13 |  |  | — |
Exercisable at December 31, 2017 |  |  | 2,991,291 |  | US$ | 5.11 |  | US$ | 0.81 |  |  | 13.13 |  |  | — |
Schedule of Share-Based Compensation Expense |
|  | For the Years ended December 31, |
|  | 2015 |  | 2016 |  | 2017 |  | 2017 |
|  | RMB |  | RMB |  | RMB |  | US$ |
General and administrative expenses |  |  | 7,304 |  |  | 7,573 |  |  | 10,099 |  |  | 1,552 |
Selling expenses |  |  | 780 |  |  | 827 |  |  | 1,542 |  |  | 237 |
|  |  | 8,084 |  |  | 8,400 |  |  | 11,641 |  |  | 1,789 |
Restricted shares [Member] |
Summary of Restricted Shares |
|  | Numbers of shares |  | Weighted average grant date fair value |
|  | RMB |  | US$ |
Outstanding, January 1, 2017 |  |  | 1,271,085 |  |  | — |
Granted |  |  | 4,818,150 |  |  | 1.48 |
Vested |  |  | — |  |  | — |
Forfeited |  |  | (47,388) |  |  | 1.93 |
Outstanding, December 31, 2017 |  |  | 6,041,847 |  |  | 1.17 |
Expected to vest, December 31, 2017 |  |  | 6,041,847 |  |  | 1.17 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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