EMPLOYEE BENEFITS OBLIGATIONS - MOVEMENT (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
EMPLOYEE BENEFITS OBLIGATIONS [abstract]
Beginning of the year	¥ 26,345	¥ 28,389
Additions	0	0
Payments	(1,858)	(2,044)
End of the year	¥ 24,487	¥ 26,345

The amount of provisions for employee benefits. [Refer: Employee benefits expense; Provisions]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 78
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_d&doctype=Standard
-URIDate 2020-01-01

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