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Segment Information - Additional Information (Details)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Segments
Dec. 31, 2019
CNY (¥)
Disclosure Of Operating Segments [Line Items]      
Number of reportable operating segments | Segments   2  
Unrecognised share of losses of joint ventures ¥ 997,000 ¥ 0 ¥ 0
Cumulative unrecognised share of losses of joint ventures ¥ 997,000 ¥ 0  
Bottom Of Range [Member]      
Disclosure Of Operating Segments [Line Items]      
Customers concentration risk, percentage of revenue 10.00% 10.00% 10.00%
PRC | Bottom Of Range [Member]      
Disclosure Of Operating Segments [Line Items]      
Percentage of revenue from external customers 90.00%    
Percentage of non-current assets (other than financial instruments) 90.00%