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Income Tax Expense - Additional Information (Detail) ¥ in Millions, $ in Millions | 12 Months Ended |
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Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 | Dec. 31, 2024 USD ($)
Disclosure of income tax expense [line items] |  |  |  |
Applicable income tax rate | 15.00% | 15.00% | 15.00% |
Percentage of withholding tax | 10.00% |  |  |
Deferred tax liability for withholding tax payable | ¥ 64.7 | ¥ 64.7 |  | $ 9.0
Unrecognized deferred tax liability relating to undistributed earnings | ¥ 227.2 | ¥ 204.7 |  | $ 31.7
PRC [member] | Bottom of range [member] |  |  |  |
Disclosure of income tax expense [line items] |  |  |  |
Unrecognized tax losses expiration period for subsidiaries that have a history of losses | 5 years |  |  |
PRC [member] | Top of range [member] |  |  |  |
Disclosure of income tax expense [line items] |  |  |  |
Unrecognized tax losses expiration period for subsidiaries that have a history of losses | 10 years |  |  |
Malaysia [member] |  |  |  |
Disclosure of income tax expense [line items] |  |  |  |
Unrecognized tax losses expiration period for subsidiaries that have a history of losses | 10 years |  |  |

X
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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2024-03-27 + Details
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