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INTANGIBLE ASSETS, NET | 12 Months Ended
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Dec. 31, 2024
INTANGIBLE ASSETS, NET |
INTANGIBLE ASSETS, NET | 13.INTANGIBLE ASSETS, NET Intangible assets consist of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Customer | ​ | Operating | ​ | Operating | ​ | Favorable | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | relationship | ​ | lease | ​ | license | ​ | lease | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | intangibles | ​ | intangibles | ​ | intangibles | ​ | intangibles |  | Technology | ​ | Others | ​ | Total
​ |  | RMB |  | RMB |  | RMB |  | RMB | ​ | RMB |  | RMB |  | RMB
Intangible assets, net at January 1, 2024 |  | — | ​ | — | ​ | 192,042 | ​ | 13,128 | ​ | 92,613 | ​ | 25,504 | ​ | 323,287
Addition of software | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 9,873 | ​ | 9,873
Decrease from disposal of centers |  | — | ​ | — | ​ | (3,938) | ​ | — | ​ | — | ​ | (725) | ​ | (4,663)
Amortization expenses |  | — | ​ | — | ​ | (12,546) | ​ | (1,565) | ​ | (13,299) | ​ | (8,945) | ​ | (36,355)
Intangible assets, net at December 31, 2024 |  | — | ​ | — | ​ | 175,558 | ​ | 11,563 | ​ | 79,314 | ​ | 25,707 | ​ | 292,142
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Intangible assets, net at December 31, 2024, in US$ |  | — | ​ | — | ​ | 24,051 | ​ | 1,584 | ​ | 10,866 | ​ | 3,522 | ​ | 40,023
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
At December 31, 2024 |  |  |  |  |  |  |  |  | ​ |  |  |  |  |
Intangible assets, cost |  | 32,449 | ​ | 418 | ​ | 248,440 | ​ | 21,010 | ​ | 132,190 | ​ | 54,969 | ​ | 489,476
Less: accumulated amortization |  | (31,486) | ​ | (418) | ​ | (72,882) | ​ | (9,447) | ​ | (52,876) | ​ | (29,262) | ​ | (196,371)
Less: intangible asset impairment |  | (963) | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (963)
Intangible assets, net at December 31, 2024 |  | — | ​ | — | ​ | 175,558 | ​ | 11,563 | ​ | 79,314 | ​ | 25,707 | ​ | 292,142
​ Amortization expenses for intangibles were RMB34,585, RMB36,705 and RMB36,355 (US$4,981) for the years ended December 31, 2022, 2023 and 2024, respectively. Impairment loss on intangible assets was nil, nil and nil for the years ended December 31, 2022, 2023 and 2024, respectively. The estimated annual amortization expenses for the above intangible assets for each of the five succeeding years are as follows: ​ ​
​ | ​ | ​ | ​ | ​
​ | ​ | Amortization
​ |  | RMB |  | US$
2025 |  | 35,959 | ​ | 4,926
2026 |  | 34,455 | ​ | 4,720
2027 |  | 29,395 | ​ | 4,027
2028 |  | 28,596 | ​ | 3,918
2029 |  | 163,736 | ​ | 22,432
​

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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