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Investment Property - Summary of Investment Property (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2019
CNY (¥)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
CNY (¥)
Disclosure of detailed information about investment property [line items]        
Beginning balance ¥ 6,765      
Charge for the year 380 $ 54 ¥ 884 ¥ 248
Ending balance 6,552 925 6,765  
Consolidated statements of profit or loss:        
Rental income from an investment property 375 53 437  
Direct operating expenses (including repairs, maintenance and depreciation expense) arising from the rental generating property (294) (41) (314)  
Fair value [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance 10,886      
Ending balance 11,419 1,612 10,886  
Cost [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance 33,972 4,795 32,944  
Translation difference 968 137 1,028  
Ending balance 34,940 4,932 33,972 32,944
Accumulated depreciation, amortization and impairment [member]        
Disclosure of detailed information about investment property [line items]        
Beginning balance 27,207 3,840 25,510  
Charge for the year 380 54 884  
Translation difference 801 113 813  
Ending balance ¥ 28,388 $ 4,007 ¥ 27,207 ¥ 25,510