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Financial Risk Management Objectives and Policies - Additional Information (Detail) ¥ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 CNY (¥) Customer | Dec. 31, 2023 USD ($) Customer | Dec. 31, 2022 CNY (¥) Customer | Dec. 31, 2023 USD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Basis points | 50.00% |  | 50.00% | 50.00%
Increase decrease in profit before tax on basis of higher lower basis points | ¥ 12.7 | $ 1.8 | ¥ 11.7 |
People's Republic of China [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Number of top customers | 5 | 5 | 5 |
People's Republic of China [member] | Top 5 Customers [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Amount owed | ¥ 597.7 |  | ¥ 993.1 | $ 84.1
Percentage of trade receivables excluding bills receivables | 40.00% | 40.00% | 53.50% |

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