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Income Tax Expense - Summary of Deferred Tax (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2023
USD ($)
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax liabilities ¥ (65,089)   ¥ (61,825)   $ (9,163)
Deferred tax assets 426,377   450,882   60,023
Reconciliation of deferred tax (expense) income [member] (39,294) $ (5,531) 41,250 ¥ (16,483)  
Net deferred tax assets 361,288   389,057   50,860
Accelerated depreciation [Member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax liabilities (77,806)   (122,298)   (10,953)
Reconciliation of deferred tax (expense) income [member] 44,492 6,263 16,472 (37,968)  
Interest receivable [Member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax liabilities 0   (3,033)   0
Reconciliation of deferred tax (expense) income [member] 3,033 427 363 (1,459)  
PRC withholding tax on dividend income [Member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax liabilities [1] (64,717)   (61,825)   (9,110)
Reconciliation of deferred tax (expense) income [member] [1] (14,457) (2,035) (11,458) (14,529)  
Effect of change in residual value and impairment of property, plant and equipment [member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax assets 2,866   69,641   404
Reconciliation of deferred tax (expense) income [member] (66,774) (9,400) 4,273 25,264  
Write-down of inventories [member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax assets 37,120   29,503   5,226
Reconciliation of deferred tax (expense) income [member] 7,617 1,072 9,253 (2,378)  
Impairment losses on trade receivables [member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax assets 7,426   7,071   1,045
Reconciliation of deferred tax (expense) income [member] 355 50 282 (1,267)  
Accruals [member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax assets 232,048   234,586   32,666
Reconciliation of deferred tax (expense) income [member] (2,505) (352) (48,841) (15,339)  
Deferred income [Member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax assets 79,896   56,480   11,247
Reconciliation of deferred tax (expense) income [member] 23,416 3,296 (41,348) (11,114)  
Others [Member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Deferred tax assets 31,854   39,185   4,484
Reconciliation of deferred tax (expense) income [member] (7,325) (1,031) (4,421) 19,235  
Losses available for offsetting against future taxable income [member]          
Disclosure of deferred tax assets and liabilities [Line Items]          
Reconciliation of deferred tax (expense) income [member] (27,146) $ (3,821) 116,675 ¥ 23,072  
Net deferred tax assets ¥ 112,601   ¥ 139,747   $ 15,851
[1] The movement of PRC withholding tax on dividend income is as follows: