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FAIR VALUE MEASUREMENTS - Intangible assets (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Growth rate |  |
Unobservable inputs |  |
Terminal growth rate (as a percent) | 3.00% |
Minimum | Discount rate |  |
Unobservable inputs |  |
Discount rate (as a percent) | 15.00% |
Maximum | Discount rate |  |
Unobservable inputs |  |
Discount rate (as a percent) | 16.00% |
Recurring | Significant Unobservable Inputs (Level 3) |  |
FAIR VALUE MEASUREMENTS [Line Items] |  |
Intangible assets | ¥ 177,814 | ¥ 158,870
Recurring | Significant Unobservable Inputs (Level 3) | Growth rate |  |
Unobservable inputs |  |
Terminal growth rate (as a percent) | 3.00% | 3.00%
Recurring | Significant Unobservable Inputs (Level 3) | Minimum | Royalty rate |  |
Unobservable inputs |  |
Royalty rate (as a percent) | 1.00% | 1.00%
Recurring | Significant Unobservable Inputs (Level 3) | Minimum | Discount rate |  |
Unobservable inputs |  |
Discount rate (as a percent) | 14.80% | 14.80%
Recurring | Significant Unobservable Inputs (Level 3) | Maximum | Royalty rate |  |
Unobservable inputs |  |
Royalty rate (as a percent) | 7.00% | 5.00%
Recurring | Significant Unobservable Inputs (Level 3) | Maximum | Discount rate |  |
Unobservable inputs |  |
Discount rate (as a percent) | 16.00% | 16.00%

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References No definition available. + Details
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- Definition Percentage of assumed long-term growth in revenues, used as an input to measure fair value. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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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