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v3.25.1

Trade and Other Receivables - Movement in the Allowance for Expected Credit Losses of Trade and Other Receivables (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥)
Reconciliation of changes in allowance account for credit losses of financial assets [abstract] |  |  |
Beginning balance | ¥ 62,604 | $ 8,726 | ¥ 39,001
Charge to consolidated statement of profit or loss (under "Selling, general and administrative expenses") | 185,523 | 25,861 | 23,858
Written off | (267) | (37) | (264)
Translation difference | 0 | 0 | 9
Ending balance | ¥ 247,860 | $ 34,550 | ¥ 62,604

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- Definition Allowance account for credit loss of financial assets. + References No definition available. + Details
Name: | ck0000932695_AllowanceAccountForCreditLossOfFinancialAssets
Namespace Prefix: | ck0000932695_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Decrease in impairment of doubtful receivables. + References No definition available. + Details
Name: | ck0000932695_Decreaseinimpairmentofdoubtfulreceivables
Namespace Prefix: | ck0000932695_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Increase decrease through net exchange difference allowance account for credit losses of financial assets. + References No definition available. + Details
Name: | ck0000932695_IncreaseDecreaseThroughNetExchangeDifferenceAllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix: | ck0000932695_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Utilisation allowance account for credit loss of financial assets. + References No definition available. + Details
Name: | ck0000932695_UtilisationAllowanceAccountForCreditLossOfFinancialAssets
Namespace Prefix: | ck0000932695_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration