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Investment Property - Summary of Investment Property (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Disclosure of detailed information about investment property [line items]        
Beginning balance ¥ 6,552      
Charge for the year 376 $ 58 ¥ 380 ¥ 884
Ending balance 5,829 901 6,552  
Consolidated statements of profit or loss:        
Rental income from an investment property 230 36 375  
Direct operating expenses (including repairs, maintenance and depreciation expense) arising from the rental generating property (180) (28) (294)  
Fair value [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance 11,419      
Ending balance 11,954 1,847 11,419  
Cost [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance 34,940 5,399 33,972  
Translation difference (1,753) (271) 968  
Ending balance 33,187 5,128 34,940 33,972
Accumulated depreciation, amortization and impairment [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance (28,388) (4,387) (27,207)  
Charge for the year 376 58 380  
Translation difference (1,406) (218) 801  
Ending balance ¥ (27,358) $ (4,227) ¥ (28,388) ¥ (27,207)