Financial assets held under resale agreements - Additional Information (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Schedule of financial instruments held under resale agreements [Line Items]
Financial Assets Held Under Resale Agreement Past Due	¥ 0	¥ 0

Schedule of financial instruments held under resale agreements

No definition available.

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