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Investment Property - Summary of Investment Property (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Disclosure of detailed information about investment property [line items]        
Beginning balance ¥ 5,829      
Charge for the year 355 $ 56 ¥ 376 ¥ 380
Ending balance 5,086 804 5,829  
Consolidated statements of profit or loss:        
Rental income from an investment property 77 12 230  
Direct operating expenses (including repairs, maintenance and depreciation expense) arising from the rental generating property (82) (13) (180)  
Fair value [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance 11,954      
Ending balance 11,308 1,789 11,954  
Cost [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance 33,187 5,249 34,940  
Translation difference (1,377) (218) (1,753)  
Ending balance 31,810 5,031 33,187 34,940
Accumulated depreciation, amortization and impairment [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance (27,358) (4,327) (28,388)  
Charge for the year 355 56 376  
Translation difference (989) (156) (1,406)  
Ending balance ¥ (26,724) $ (4,227) ¥ (27,358) ¥ (28,388)