TRADE RECEIVABLES - MOVEMENTS ON PROVISION FOR IMPAIRMENT OF TRADE RECEIVABLES (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
TRADE RECEIVABLES [abstract]
At beginning of period	¥ 4,965	¥ 8,395	¥ 7,003
Provision for impairment loss	5,904	6	3,305
Reversal			(127)
Written-off	(4,666)	(3,436)	(1,786)
At end of period	¥ 6,203	¥ 4,965	¥ 8,395

The amount of reversal of impairment loss recognised in profit or loss for trade receivables. [Refer: Reversal of impairment loss recognised in profit or loss; Trade receivables]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

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