XML 89 R74.htm IDEA: XBRL DOCUMENT v3.22.1
Intangible asset (Details) - CNY (¥)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cost    
Begining Balance ¥ 9,000 ¥ 9,000
Ending Balance 9,000 9,000
Accumulated Amortization    
Begining Balance 3,000 2,000
Amortization 1,000 1,000
Ending Balance 4,000 3,000
Carrying Amount ¥ 5,000 ¥ 6,000