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INTANGIBLE ASSETS, NET | 12 Months Ended
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Dec. 31, 2025
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, 2025 |  | — | ​ | — | ​ | 175,558 | ​ | 11,563 | ​ | 79,314 | ​ | 25,707 | ​ | 292,142
Addition of software | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 30 | ​ | 30
Decrease from disposal of centers |  | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (145) | ​ | (145)
Amortization expenses |  | — | ​ | — | ​ | (12,422) | ​ | (1,564) | ​ | (13,219) | ​ | (8,917) | ​ | (36,122)
Intangible assets, net at December 31, 2025 |  | — | ​ | — | ​ | 163,136 | ​ | 9,999 | ​ | 66,095 | ​ | 16,675 | ​ | 255,905
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Intangible assets, net at December 31, 2025, in US$ |  | — | ​ | — | ​ | 23,328 | ​ | 1,430 | ​ | 9,451 | ​ | 2,385 | ​ | 36,594
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
At December 31, 2025 |  | ​ |  | ​ |  | ​ |  | ​ | ​ | ​ |  | ​ |  | ​
Intangible assets, cost |  | 32,449 | ​ | 418 | ​ | 248,440 | ​ | 21,010 | ​ | 132,190 | ​ | 51,728 | ​ | 486,235
Less: accumulated amortization |  | (31,486) | ​ | (418) | ​ | (85,304) | ​ | (11,011) | ​ | (66,095) | ​ | (35,053) | ​ | (229,367)
Less: intangible asset impairment |  | (963) | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (963)
Intangible assets, net at December 31, 2025 |  | — | ​ | — | ​ | 163,136 | ​ | 9,999 | ​ | 66,095 | ​ | 16,675 | ​ | 255,905
​ Amortization expenses for intangibles were RMB36,705, RMB36,355 and RMB36,122 (US$5,165) for the years ended December 31, 2023, 2024 and 2025, respectively. Impairment loss on intangible assets was nil, nil and nil for the years ended December 31, 2023, 2024 and 2025, respectively. The estimated annual amortization expenses for the above intangible assets for each of the five succeeding years are as follows: ​
​ | ​ | ​ | ​ | ​
​ | ​ | Amortization
​ | ​ ​ ​ | RMB | ​ ​ ​ | US$
2026 |  | 34,177 | ​ | 4,887
2027 |  | 29,380 | ​ | 4,201
2028 |  | 28,601 | ​ | 4,090
2029 |  | 28,372 | ​ | 4,057
2030 |  | 28,366 | ​ | 4,056
There after | ​ | 107,009 | ​ | 15,303
Total | ​ | 255,905 | ​ | 36,594
​

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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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