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Long-term debt - Schedule of Debt (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Long-Term Debt, Unclassified [Abstract]      
Long-term bank loans ¥ 3,069,000 $ 420,500  
Convertible notes 100,000    
Convertible senior notes 95,153   ¥ 646
Total ¥ 3,264,153 $ 447,187 ¥ 646