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PROPERTY, EQUIPMENT AND SOFTWARE, NET - Additional Information (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 CNY (¥) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥)
Property, equipment and software, net |  |  |  |  |
Depreciation and amortization of property, equipment and software | ¥ 13,600,000 | $ 2,000 | ¥ 61,464,000 |  | ¥ 86,866,000
Gain (loss) on disposal of property, equipment and software | 1,071,000 | 152 | (7,345,000) | $ (1,000) | 50,000
Gain (loss) on disposition of property plant equipment | 1,100,000 | 200 |  |  |
Impairment loss of equipment | 0 |  | 6,505,000 |  | 161,002,000
Cost of revenues |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Depreciation and amortization charges | 7,400,000 | 1,100 | 19,900,000 |  | 69,400,000
General and administrative expense |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Depreciation and amortization charges | ¥ 6,200,000 | $ 900 | ¥ 41,600,000 |  | ¥ 17,500,000

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