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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2020
SHARE-BASED COMPENSATION |
Summary of the Group's share option activity under the option plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | Weighted Average |  | ​
​ | ​ | Number of | ​ | Weighted Average | ​ | Remaining | ​ | Aggregate Intrinsic
​ | ​ | Options | ​ | Exercise Price | ​ | Contractual Life | ​ | Value
​ | ​ | ​ | ​ | US$ | ​ | Years | ​ | US$'million
Share options outstanding at January 1, 2020 |  | 47,632 |  | 4.95 |  | ​ |  | ​
Forfeited | ​ | (1,000) | ​ | 1.53 | ​ | ​ | ​ | ​
Exercised |  | (46,632) |  | 5.03 |  | ​ |  | ​
Share options outstanding at December 31, 2020 |  | — |  | ​ |  | — |  | —
Share options vested or expected to vest at December 31, 2020 |  | — |  | ​ |  | — |  | —
Share options exercisable at December 31, 2020 |  | — |  | ​ |  | — |  | —
Summary of the Group's nonvested restricted stock activity | ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​
​ | ​ | ​ | ​ | Weighted Average Grant
​ | ​ | Number of Restricted | ​ | Date
​ | ​ | Stocks | ​ | Fair Value
​ | ​ |  | ​ | US$
Nonvested restricted stocks outstanding at January 1, 2020 |  | 10,245,390 |  | 9.87
Granted |  | 493,407 |  | 32.74
Forfeited |  | (1,671,111) |  | 8.45
Vested |  | (1,407,675) |  | 11.41
Adjusted for performance conditions |  | (564,603) |  | 5.93
Nonvested restricted stocks outstanding at December 31, 2020 |  | 7,095,408 |  | 11.80

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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