FINANCIAL RISK MANAGEMENT - MARKET RISK - OTHER PRICE RISK (Details) - CNY (¥)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of nature and extent of risks arising from financial instruments [line items]
Other comprehensive income	¥ 0	¥ 0	¥ 181,941,000
Other price risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Increase (Decrease) expected price of equity investments (as percent)	5.00%	5.00%
Other comprehensive income	¥ 13,164,000	¥ 12,047,000

The amount of income and expense (including reclassification adjustments) that is not recognised in profit or loss as required or permitted by IFRSs. [Refer: IFRSs [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2019-01-01
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-Subparagraph d
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2019-01-01
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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