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PROPERTY, PLANT AND EQUIPMENT, NET | 12 Months Ended
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Dec. 31, 2024
PROPERTY, PLANT AND EQUIPMENT, NET |
PROPERTY, PLANT AND EQUIPMENT, NET | 10.PROPERTY, PLANT AND EQUIPMENT, NET Property, plant and equipment consist of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As at December 31,
​ | ​ | 2023 | ​ | 2024 | ​ | 2024
​ |  | RMB |  | RMB |  | US$
Buildings |  | 807,737 | ​ | 798,097 | ​ | 109,339
Medical equipment |  | 522,385 | ​ | 865,416 | ​ | 118,562
Electronic and office equipment |  | 58,999 | ​ | 55,202 | ​ | 7,563
Motor vehicles |  | 3,718 | ​ | 2,649 | ​ | 363
Leasehold improvement and building improvements |  | 81,766 | ​ | 77,683 | ​ | 10,643
Construction in progress |  | 2,466,320 | ​ | 2,307,336 | ​ | 316,104
Total |  | 3,940,925 | ​ | 4,106,383 | ​ | 562,574
Less: accumulated depreciation |  | (385,042) | ​ | (394,273) | ​ | (54,017)
Impairment charges |  | (9,010) | ​ | (7,785) | ​ | (1,067)
​ |  | 3,546,873 | ​ | 3,704,325 | ​ | 507,490
​ Depreciation expenses were RMB88,692, RMB82,124 and RMB84,775 (US$11,614) for the years ended December 31, 2022, 2023 and 2024, respectively. Impairment loss of RMB nil, nil and nil were recognized for network operating segment and impairment loss of nil, nil and nil for hospital operating segment for the years ended December 31, 2022, 2023 and 2024, respectively. For the years ended December 31, 2022, 2023 and 2024, impairment of nil, RMB7,138 and RMB1,225 (US$168) was written off for network operating segment upon the disposal of medical equipment and construction project. Impairment of nil, nil and nil was written off for hospital operating segment upon the termination of construction project. The Group held equipment under operating lease contracts with customers with an original cost of RMB124,894 and RMB111,017 (US$15,209) and accumulated depreciation of RMB104,174 and RMB92,448 (US$12,665), as of December 31, 2023 and 2024, respectively. The total net book value of the Group’s property, plant and equipment pledged as collateral for bank and other borrowings as of December 31, 2023 and 2024 was RMB391,056 and RMB576,261 (US$78,947) (note 19), respectively. The total net book value of the Group’s construction in progress pledged to secure bank and other borrowings as of December 31, 2023 and 2024 was RMB2,027,277 and RMB1,814,768 (US$ 248,622) (note 19), respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-7 + Details
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