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Principal activities and reorganization - Additional Information (Details) - May 07, 2021 - IPO
¥ in Billions
CNY (¥)
shares
$ / shares
Proceeds from the global offering | ¥ ¥ 2.1  
American depositary shares    
Stock Issued During Period, Shares, New Issues 30,000,000  
Shares Issued, Price Per Share | $ / shares   $ 12
Class A ordinary shares    
Stock Issued During Period, Shares, New Issues 300,000,000