AUDITORS' REMUNERATION (Details) - CNY (¥)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AUDITORS' REMUNERATION [abstract]
Auditor's remuneration for audit services	¥ 8,400,000	¥ 8,400,000	¥ 8,400,000
Auditor's remuneration for non-audit services	¥ 610,000	¥ 930,000	¥ 750,000

The amount of fees paid or payable to the entity's auditors for services that the entity does not separately disclose in the same statement or note.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

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