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SHARE-BASED AWARDS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
SHARE-BASED AWARDS |
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 | The following table summarizes employee share options activities for the year ended December 31, 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​
​ | ​ | ​ | ​ | ​ | Weighted- | ​ | ​ | Weighted | ​ | Average | ​ | ​
​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | ​ | Exercise | ​ | ​ | Grant-date | ​ | Contractual | ​ | Intrinsic
Share Options Granted to Employees |  | Shares |  | ​ | Price |  | ​ | Fair Value |  | Term (Years) |  | Value
Outstanding, January 1, 2021 |  | 2,774,229 |  | US$ | 2.04 |  | US$ | 0.65 |  | 1.13 |  | —
Lapsed |  | (116,283) |  | US$ | 2.04 |  | US$ | 0.65 |  | — |  | —
Outstanding, December 31, 2021 |  | 2,657,946 |  | US$ | 2.04 |  | US$ | 0.65 |  | 0.13 |  | —
Exercisable at December 31, 2021 |  | 2,657,946 |  | US$ | 2.04 |  | US$ | 0.65 |  | 0.13 |  | —
Summary of Restricted Shares | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Fair Value per Share
​ | ​ | ​ | ​ | at the Grant
Grant Date |  | Number of Awards |  | date (US$)
February 18, 2014 |  | 1,370,250 |  | 1.93
July 1, 2014 |  | 21,132 |  | 2.35
August 1, 2014 |  | 69,564 |  | 2.44
August 7, 2017 |  | 1,453,950 |  | 1.33
August 8, 2017 |  | 3,319,200 |  | 1.34
September 13, 2017 |  | 45,000 |  | 1.33
October 2, 2018 |  | 5,992,605 |  | 1.19
​ The Company recognizes the compensation expense on a straight-line basis over the requisite service period for the entire award. Restricted Shares activity for the year ended December 31, 2021 was as follows: ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted
​ | ​ | Numbers | ​ | average grant
​ | ​ | of shares | ​ | date fair value
​ | ​ | RMB | ​ | US$
Outstanding, January 1, 2021 |  | 11,033,064 |  | 1.31
Granted |  | — |  | —
Forfeited |  | (134,775) |  | 1.22
Exercised |  | — |  | —
Outstanding, December 31, 2021 |  | 10,898,289 |  | 1.31
Exercisable, December 31, 2021 | ​ | 5,084,184 | ​ | 1.45
Expected to vest, December 31, 2021 |  | 5,814,105 |  | 1.19
Schedule of Share-Based Compensation Expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Years ended December 31,
​ | ​ | 2019 | ​ | 2020 | ​ | 2021 | ​ | 2021
​ |  | RMB |  | RMB |  | RMB |  | US$
General and administrative expenses |  | 17,673 |  | 17,553 |  | 12,565 |  | 1,972
Selling expenses |  | 2,920 |  | 3,068 |  | 2,115 |  | 332
​ |  | 20,593 |  | 20,621 |  | 14,680 |  | 2,304

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