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Prepayments and other current assets (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Prepayments and other current assets    
Prepayment ¥ 43,278 ¥ 109,027
Other current assets 124,839 134,603
Total ¥ 168,117 ¥ 243,630