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Financial Assets and Financial Liabilities - Additional Information (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Financial Instruments [Line Items]    
Transfers out of Level 1 into Level 2 of fair value hierarchy, assets ¥ 0 ¥ 0
Transfers out of Level 2 into Level 1 of fair value hierarchy, assets 0 0
Transfers out of Level 1 into Level 2 of fair value hierarchy, liabilities 0 0
Transfers out of Level 2 into Level 1 of fair value hierarchy, liabilities 0 0
Transfers into Level 3 of fair value hierarchy, assets 0 0
Transfers out of Level 3 of fair value hierarchy, assets 0 0
Transfers into Level 3 of fair value hierarchy, liabilities 0 0
Transfers out of Level 3 of fair value hierarchy, liabilities ¥ 0 ¥ 0
Trade receivables [member] | Largest Customer    
Disclosure Of Financial Instruments [Line Items]    
Credit risk concentration 17.00% 7.00%
Trade receivables [member] | Five Largest Customers    
Disclosure Of Financial Instruments [Line Items]    
Credit risk concentration 47.00% 28.00%