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Leases - Summary of Total Cash Outflow for Leases Included in Statement of Cash Flows (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Presentation of leases for lessee [abstract]      
Total cash outflow for leases ¥ 5,252 ¥ 5,463 ¥ 2,672