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Income Tax Expense - Deferred Tax Assets That Have Not Been Recognized (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)
Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]
Unutilized tax losses	¥ 473,456	$ 68,105	¥ 414,212
Unutilized capital allowances and investment allowances	100,643	14,477	103,810
Other unrecognized temporary differences relating to asset impairment and deferred grants	142,851	20,548	199,203
Deferred tax assets have not been recognised	¥ 716,950	$ 103,130	¥ 717,225

X

- Definition

Unrecognized deferred tax assets.

+ References

No definition available.

+ Details

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X

- Definition

The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2022-03-24
-Paragraph 81
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_e&doctype=Standard
-URIDate 2022-03-24

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- References

No definition available.

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- Definition

The amount of unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax credits [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2022-03-24
-Paragraph 81
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_e&doctype=Standard
-URIDate 2022-03-24

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X

- Definition

The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2022-03-24
-Paragraph 81
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_e&doctype=Standard
-URIDate 2022-03-24

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