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Other Income and Expenses Recognized in Statement of Profit and Loss - Summary of Depreciation and Amortization (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 income statement [line items]        
Amortization of intangible assets ¥ 1,012 $ 143    
Amortization of prepaid operating lease     ¥ 12,724 ¥ 12,366
Depreciation of investment property 380 54 884 248
Depreciation of property, plant and equipment 422,859 59,683 420,277 431,567
Depreciation of right-of-use assets 40,958 5,781    
Depreciation and amortization expenses 465,209 65,661 433,885 444,181
Cost of sales [member]        
Disclosure of income statement [line items]        
Depreciation and amortization expenses 315,445 44,523 312,769 307,102
Research and development expenses [Member]        
Disclosure of income statement [line items]        
Depreciation and amortization expenses 16,470 2,325 26,751 48,291
Selling general and administrative expenses [member]        
Disclosure of income statement [line items]        
Depreciation and amortization expenses ¥ 133,294 $ 18,813 ¥ 94,365 ¥ 88,788