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FAIR VALUE MEASUREMENTS - Additional Information (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Nonrecurring |  |
FAIR VALUE MEASUREMENTS |  |
Impairment charge, long-lived assets | ¥ 0 | ¥ 0

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