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Leases - Summary of Detailed Information About Amounts Recognized In Profit of Loss (Detail) - 12 months ended Dec. 31, 2019 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
Disclosure Of Detailed Information About Lease Cost [Line Items]
Depreciation charge for right-of-use assets	¥ 40,958	$ 5,781
Interest expenses on lease liabilities	2,918	412
Expenses relating to short-term leases (included in selling, general and administrative costs and research and development cost)	14,341	2,024
Total amount recognized in profit or loss	¥ 58,217	$ 8,217

X

- Definition

Disclosure of detailed information about lease cost .

+ References

No definition available.

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- Definition

Lease Expense.

+ References

No definition available.

+ Details

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Namespace Prefix:	cyd_
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X

- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_a&doctype=Standard
-URIDate 2019-03-27

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- Definition

The amount of the expense relating to short-term leases accounted for applying paragraph 6 of IFRS 16. This expense need not include the expense relating to leases with a lease term of one month or less. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_c&doctype=Standard
-URIDate 2019-03-27

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- Definition

The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_b&doctype=Standard
-URIDate 2019-03-27

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