NET IMPAIRMENT LOSSES ON FINANCIAL ASSETS (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
NET IMPAIRMENT LOSSES ON FINANCIAL ASSETS
Impairment losses on trade and notes receivables (Note 14)		¥ 338,972	¥ 154,409	¥ 44,078
Impairment losses on other current assets (Note 15)		639,862	16,607	63,878
Total	$ 150,013	¥ 978,834	¥ 171,016	¥ 107,956

The amount of impairment loss on financial assets. [Refer: Financial assets; Impairment loss]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 20
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_e&doctype=Standard&book=b
-URIDate 2020-01-01

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