Right-of-use assets (Details) - CNY (¥) ¥ in Millions	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Disclosure of quantitative information about right-of-use assets [abstract]
Purchase of right-of-use assets	¥ 27.9	¥ 13.5

The amount of additions to right-of-use assets. [Refer: Right-of-use assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 53
-Subparagraph h
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_h&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_AdditionsToRightofuseAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration