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PROPERTY, EQUIPMENT AND SOFTWARE, NET (Tables) | 12 Months Ended
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Dec. 31, 2025
PROPERTY, EQUIPMENT AND SOFTWARE, NET |
Schedule of property, equipment and software and related accumulated depreciation and amortization | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | December 31, | ​ ​ ​ | December 31, | ​ ​ ​ | December 31,
​ | ​ ​ ​ | 2024 | ​ ​ ​ | 2025 | ​ ​ ​ | 2025
​ | ​ ​ ​ | RMB | ​ ​ ​ | RMB | ​ ​ ​ | US$
​ | ​ | ​ | ​ | (in thousands) | ​ | (Note 3)
Computers and equipment |  | 175,244 | ​ | 73,478 | ​ | 10,507
Office furniture and fixtures |  | 1,592 | ​ | 1,736 | ​ | 248
Motor vehicles |  | 3,667 | ​ | 3,694 | ​ | 528
Software |  | 10,542 | ​ | 10,542 | ​ | 1,508
Leasehold improvements | ​ | — | ​ | 1,021 | ​ | 146
Less: accumulated depreciation and amortization |  | (174,496) | ​ | (46,889) | ​ | (6,705)
Net book value |  | 16,549 | ​ | 43,582 | ​ | 6,232

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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