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FAIR VALUE MEASUREMENTS (Tables) | 12 Months Ended
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Dec. 31, 2020
FAIR VALUE MEASUREMENTS |
Schedule of fair value measurements for each class of assets on nonrecurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement at the End of the Reporting Period Using | ​ | ​
​ | ​ | ​ | ​ | Quoted Prices in | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Active | ​ | Significance | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Markets for | ​ | Other | ​ | Significant | ​ | ​
​ | ​ | As of | ​ | Identical | ​ | Observable | ​ | Unobservable | ​ | ​
​ | ​ | December 31, | ​ | Assets | ​ | Inputs | ​ | Inputs | ​ | Total
​ | ​ | 2019 | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3) | ​ | Loss
​ |  | RMB |  | RMB |  | RMB |  | RMB |  | RMB
Description |  |  | ​ |  |  |  |  |  |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nonrecurring fair value measurements: |  |  | ​ |  |  |  |  |  |  |
Long-lived assets held and used |  | 1,985 | ​ | — |  | — |  | 1,985 |  | (6,849)

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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