REVENUE (Schedule of Disaggregated revenue information) (Details) ¥ in Thousands, $ in Thousands	6 Months Ended
Jun. 30, 2021 USD ($)	Jun. 30, 2021 CNY (¥)	Jun. 30, 2020 CNY (¥)
IfrsStatementLineItems [Line Items]
Revenue from contracts with a customer			¥ 6,867
Sale of copper ores [Member] \| Type of goods [Member]
IfrsStatementLineItems [Line Items]
Revenue from contracts with a customer	0	0	6,867
Mainland China [Member] \| Geographic market [Member]
IfrsStatementLineItems [Line Items]
Revenue from contracts with a customer	0	0	6,867
Goods or services transferred at point in time [member] \| Timing of revenue recognition [Member]
IfrsStatementLineItems [Line Items]
Revenue from contracts with a customer	$ 0	¥ 0	¥ 6,867

The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2021-01-01
-Paragraph 113
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_113_a&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2021-01-01
-Paragraph 114
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_114&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_RevenueFromContractsWithCustomers
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration