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Loan receivables (Details 1) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Loan Receivables Details 1Abstract    
Credit impairment losses as at January 1 ¥ 26,724 ¥ 21,733
Changes on initial application of IFRS 9 304,238
Charge to statement of profit 67,574 4,991
Write-off (1,239)
Credit impairment losses as at December 31 ¥ 397,297 ¥ 26,724