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Intangible assets, net - Estimated amortization expenses for intangible assets (Details)
¥ in Thousands
Dec. 31, 2023
CNY (¥)
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
2024 ¥ 68,895
2025 62,511
2026 46,802
2027 811
2028 ¥ 253