XML 80 R67.htm IDEA: XBRL DOCUMENT v3.21.1
Income tax expense (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income tax expense      
Current tax on profit for the year ¥ 0 ¥ 0 ¥ 18,033
Deferred income tax expenses 0 0 0
Income tax expense ¥ 0 ¥ 0 ¥ 18,033