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Cash and Cash Equivalents - Additional Information (Details) - CNY (¥)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Cash And Cash Equivalents [Line Items]        
Cash and cash equivalents ¥ 59,045,000 ¥ 25,719,000 ¥ 23,010,000 ¥ 31,128,000
Group        
Disclosure Of Cash And Cash Equivalents [Line Items]        
Cash and cash equivalents ¥ 16,046,000 ¥ 22,649,000