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Leases - Summary of Amounts Recognised in Profit or Loss (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Presentation of leases for lessee [abstract]      
Depreciation of right-of-use assets ¥ 4,139 ¥ 4,480 ¥ 1,618
Interest expense on lease liabilities 1,082 2,561 613
Covid-19-related rent concessions from a lessor 0 (778) 0
Expense relating to short term leases and leases of low-value assets included in administrative expenses 1,604 775 112
Total amount recognised in profit or loss ¥ 6,825 ¥ 7,038 ¥ 2,343