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Accounts Receivables, Net - ​Schedule of Accounts Receivables (Details) - CNY (¥)
¥ in Thousands
Jun. 30, 2026
Dec. 31, 2025
​Schedule of Accounts Receivables [Abstract]    
Accounts receivable ¥ 5,074 ¥ 6,522
Less: allowance for credit loss
Accounts receivable, net ¥ 5,074 ¥ 6,522