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Financial assets measured at fair value through other comprehensive income (Details) - CNY (¥)
Aug. 04, 2016
Dec. 31, 2022
Dec. 31, 2021
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income      
Current financial asset at fair value through other comprehensive income   ¥ 2,054,541,000 ¥ 1,122,998,000
Less: Non-current financial asset measured at fair value through other comprehensive income   (821,110,000) (640,501,000)
Financial assets measured at fair value through other-comprehensive income.   1,233,431,000 482,497,000
Exchange Settlement Centre Co., Ltd.      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income      
Equity interest acquired (as a percent) 5.00%    
Consideration transferred ¥ 5,000,000    
Loans and advances to customers.      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income      
Current financial asset at fair value through other comprehensive income   1,608,402,000 1,103,460,000
Equity securities      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income      
Current financial asset at fair value through other comprehensive income   3,204,000 3,204,000
Debt securities      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income      
Current financial asset at fair value through other comprehensive income   ¥ 442,935,000 ¥ 16,334,000