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Profit(loss) before income taxes (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Depreciation Of Property And Equipment ¥ 2,973 ¥ 2,977 ¥ 2,944
Amortization Of Intangible Asset 1 1 2
Directors      
Salaries And Related Costs 602 1,051 1,704
Social Benefits Contribution 11 5 44
Share Based Compensation 0 37 50
Key Management Personnel (other Than Directors)      
Salaries And Related Costs 1,380 1,563 2,079
Social Benefits Contribution 11 5 51
Share Based Compensation 0 74 25
Other Than Directors And Key Management Personnel      
Salaries And Related Costs 578 707 2,653
Social Benefits Contribution ¥ 44 ¥ 10 ¥ 456