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Intangible assets, net - Schedule of net intangible assets (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2024
Jan. 31, 2024
Dec. 31, 2023
Intangible assets, net      
Intangible assets ¥ 491,226   ¥ 268,469
Less: accumulated amortization (177,871)   (86,183)
Less: impairment (3,578)   (2,945)
Intangible assets, net 309,777   179,341
Software      
Intangible assets, net      
Intangible assets 164,369   121,950
Distribution and licensing rights      
Intangible assets, net      
Intangible assets 185,363   143,725
Trademark      
Intangible assets, net      
Intangible assets 270   139
Patent      
Intangible assets, net      
Intangible assets 2,655   2,655
Developed technology      
Intangible assets, net      
Intangible assets ¥ 138,569 ¥ 138,569 ¥ 0