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SUBSEQUENT EVENTS (Details) - Feishang Anthracite Resources Limited [Member]
¥ / shares in Units, ¥ in Thousands, $ in Thousands
Aug. 17, 2020
$ / shares
Aug. 17, 2020
CNY (¥)
shares
¥ / shares
Aug. 17, 2020
HKD ($)
shares
Disclosure of non-adjusting events after reporting period [line items]      
Number of shares acquired   120,000,000 120,000,000
Percentage of equity interest acquired   8.69% 8.69%
Number of shares issued by Compnay   9,077,166 9,077,166
Price of shares issued by Compnay | $ / shares $ 1.244    
HKD [Member]      
Disclosure of non-adjusting events after reporting period [line items]      
Value of acquired shares | $     $ 87,522
CNY [Member]      
Disclosure of non-adjusting events after reporting period [line items]      
Value of acquired shares | ¥   ¥ 79,785  
Price of shares issued by Compnay | ¥ / shares   ¥ 8.789