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v3.25.1

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | ¥ 3,553,601 |  |  |
Charge for the year | 462,588 | $ 64,483 | ¥ 508,726 | ¥ 516,276
Ending balance | 3,418,243 | 476,490 | 3,553,601 |
Cost [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 9,820,928 |  | 9,794,919 |
Additions | 352,829 |  | 178,876 |
Disposal of subsidiary |  |  | (107,785) |
Disposals | (16,213) |  | (30,811) |
Write-off | (5,996) |  | (13,764) |
Translation difference | 5,455 |  | (507) |
Ending balance | 10,157,003 |  | 9,820,928 | 9,794,919
Accumulated depreciation, amortization and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | (6,267,327) |  | (5,799,175) |
Charge for the year | 483,266 |  | 527,556 |
Disposal of subsidiary |  |  | 66,674 |
Disposals | 15,523 |  | 24,922 |
Write-off | 5,764 |  | 12,033 |
Impairment loss | 7,332 |  | 44,667 |
Translation difference | 2,122 |  | (442) |
Ending balance | (6,738,760) |  | (6,267,327) | (5,799,175)
Freehold land [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 14,592 |  |  |
Ending balance | 14,689 | 2,048 | 14,592 |
Freehold land [member] | Cost [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 15,056 |  | 14,654 |
Translation difference | 123 |  | 402 |
Ending balance | 15,179 |  | 15,056 | 14,654
Freehold land [member] | Accumulated depreciation, amortization and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | (464) |  | (477) |
Translation difference | 26 |  | (13) |
Ending balance | (490) |  | (464) | (477)
Buildings and improvements [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 1,401,655 |  |  |
Ending balance | 1,322,267 | 184,319 | 1,401,655 |
Buildings and improvements [member] | Cost [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 2,568,485 |  | 2,610,784 |
Additions | 550 |  | 2,903 |
Disposal of subsidiary |  |  | (80,585) |
Transfers | 9,055 |  | 38,506 |
Write-off | (195) |  | (2,890) |
Translation difference | 2,862 |  | (233) |
Ending balance | 2,580,757 |  | 2,568,485 | 2,610,784
Buildings and improvements [member] | Accumulated depreciation, amortization and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | (1,166,830) |  | (1,111,128) |
Charge for the year | 90,890 |  | 92,919 |
Disposal of subsidiary |  |  | 44,274 |
Write-off | 62 |  | 2,068 |
Impairment loss |  |  | 9,162 |
Translation difference | 832 |  | (37) |
Ending balance | (1,258,490) |  | (1,166,830) | (1,111,128)
Construction in progress [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 239,114 |  |  |
Ending balance | 289,177 | 40,310 | 239,114 |
Construction in progress [member] | Cost [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 253,735 |  | 348,769 |
Additions | 315,019 |  | 149,846 |
Transfers | (264,976) |  | (244,741) |
Write-off | (203) |  |  |
Translation difference | 20 |  | (139) |
Ending balance | 303,595 |  | 253,735 | 348,769
Construction in progress [member] | Accumulated depreciation, amortization and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | (14,621) |  | (14,060) |
Write-off | 203 |  |  |
Impairment loss |  |  | 561 |
Ending balance | (14,418) |  | (14,621) | (14,060)
Plant and machinery [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 1,829,082 |  |  |
Ending balance | 1,729,300 | 241,058 | 1,829,082 |
Plant and machinery [member] | Cost [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 6,655,861 |  | 6,471,846 |
Additions | 23,613 |  | 18,676 |
Disposal of subsidiary |  |  | (21,632) |
Disposals | (13,275) |  | (7,000) |
Transfers | 251,609 |  | 201,642 |
Write-off | (815) |  | (7,474) |
Translation difference | 1,277 |  | (197) |
Ending balance | 6,918,270 |  | 6,655,861 | 6,471,846
Plant and machinery [member] | Accumulated depreciation, amortization and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | (4,826,779) |  | (4,419,261) |
Charge for the year | 368,070 |  | 402,554 |
Disposal of subsidiary |  |  | 17,225 |
Disposals | 12,794 |  | 5,456 |
Write-off | 771 |  | 6,681 |
Impairment loss | 7,332 |  | 34,458 |
Translation difference | 354 |  | (132) |
Ending balance | (5,188,970) |  | (4,826,779) | (4,419,261)
Office furniture, fittings and equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 41,417 |  |  |
Ending balance | 38,720 | 5,397 | 41,417 |
Office furniture, fittings and equipment [member] | Cost [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 234,144 |  | 232,329 |
Additions | 12,734 |  | 7,151 |
Disposal of subsidiary |  |  | (5,568) |
Disposals | (666) |  | (772) |
Transfers | 3,865 |  | 4,593 |
Write-off | (4,521) |  | (3,229) |
Translation difference | 1,110 |  | (360) |
Ending balance | 246,666 |  | 234,144 | 232,329
Office furniture, fittings and equipment [member] | Accumulated depreciation, amortization and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | (192,727) |  | (179,987) |
Charge for the year | 19,439 |  | 21,568 |
Disposal of subsidiary |  |  | 5,175 |
Disposals | 610 |  | 687 |
Write-off | 4,479 |  | 3,123 |
Impairment loss |  |  | 438 |
Translation difference | 869 |  | (281) |
Ending balance | (207,946) |  | (192,727) | (179,987)
Motor and transport vehicles [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 27,741 |  |  |
Ending balance | 24,090 | $ 3,358 | 27,741 |
Motor and transport vehicles [member] | Cost [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 93,647 |  | 116,537 |
Additions | 913 |  | 300 |
Disposals | (2,272) |  | (23,039) |
Transfers | 447 |  |  |
Write-off | (262) |  | (171) |
Translation difference | 63 |  | 20 |
Ending balance | 92,536 |  | 93,647 | 116,537
Motor and transport vehicles [member] | Accumulated depreciation, amortization and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | (65,906) |  | (74,262) |
Charge for the year | 4,867 |  | 10,515 |
Disposals | 2,119 |  | 18,779 |
Write-off | 249 |  | 161 |
Impairment loss |  |  | 48 |
Translation difference | 41 |  | 21 |
Ending balance | ¥ (68,446) |  | ¥ (65,906) | ¥ (74,262)

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- Definition The decrease in property, plant and equipment resulting from the loss of control of a subsidiary. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2024-03-27 + Details
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