v3.25.1
Income tax - Tax Holiday (Details) - CNY (¥)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income tax        
The aggregate effect ¥ 179,435   ¥ 63,325  
Per share effect - basic and diluted ¥ 0.08   ¥ 0.03  
Statutory income tax rate 25.00% 25.00% 25.00%  
Valuation allowance ¥ 5,339,883 ¥ 5,380,024 ¥ 3,151,394 ¥ 1,061,275