RIGHT-OF-USE ASSETS AND LEASES LIABILITIES - Contractual undiscounted cash flows (Details) ¥ in Thousands	Dec. 31, 2020 CNY (¥)
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total contractual undiscounted cash flow	¥ 64,947
Not later than one month [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total contractual undiscounted cash flow	15,478
One to five years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total contractual undiscounted cash flow	¥ 49,469

The amount of contractual undiscounted cash flows in relation to lease liabilities before deducting finance charges. [Refer: Lease liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 58
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_58&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph B11D
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_B11D_a&doctype=Appendix&subtype=B
-URIDate 2020-01-01

Name:	ifrs-full_GrossLeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant