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Long-Term Investments - Summary of long-term investments (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Long-Term Investments      
Equity securities without readily determinable fair value - Balances, beginning ¥ 33,605 ¥ 11,969 ¥ 11,812
Equity securities without readily determinable fair value - Additions 8,539 24,208  
Equity securities without readily determinable fair value - Impairment 0 (2,060) 0
Equity securities without readily determinable fair value - Foreign currency translation adjustment 624 (512) 157
Equity securities without readily determinable fair value - Balances, ending ¥ 42,768 ¥ 33,605 ¥ 11,969