XML 112 R98.htm IDEA: XBRL DOCUMENT v3.21.1

Other Income and Expenses Recognized in Statement of Profit and Loss - Summary of Sales Related Shipping and Handling Expenses Not Separately Billed to Customers (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Selling general and administrative expenses [member]
Disclosure of income statement [line items]
Selling, general and administrative expenses	¥ 237,683	$ 36,729	¥ 221,255	¥ 211,971

X

- Definition

Disclosure of income statement [line items]

+ References

No definition available.

+ Details

Name:	cyd_DisclosureOfIncomeStatementLineItems
Namespace Prefix:	cyd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Shipping and handling costs.

+ References

No definition available.

+ Details

Name:	cyd_ShippingAndHandlingCosts
Namespace Prefix:	cyd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	ifrs-full_InitiallyAppliedIFRSsAxis=cyd_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: