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PROPERTY, PLANT AND EQUIPMENT (Details) - CNY (¥)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]      
Balance ¥ 68,000    
Impairment losses recognized in profit or loss 0 ¥ 0 ¥ 0
Balance 1,250,000 68,000  
Cost      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 1,101,829,000 1,101,783,000  
Additions 1,277,000 46,000  
Transferred to investment property (331,359,000)    
Disposals 0 0  
Balance 771,747,000 1,101,829,000 1,101,783,000
Accumulated depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (403,986,000) (403,974,000)  
Depreciation charge 96,000 12,000  
Transferred to investment property (47,452,000)    
Balance (356,630,000) (403,986,000) (403,974,000)
Impairment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (697,774,000) (697,774,000)  
Impairment losses recognized in profit or loss 0 0  
Transferred to investment property (283,907,000)    
Balance (413,867,000) (697,774,000) (697,774,000)
Buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 0    
Balance 0 0  
Buildings | Cost      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 349,630,000 349,630,000  
Additions 0 0  
Transferred to investment property (331,359,000)    
Disposals 0 0  
Balance 18,271,000 349,630,000 349,630,000
Buildings | Accumulated depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (49,297,000) (49,297,000)  
Depreciation charge 0 0  
Transferred to investment property (47,452,000)    
Balance (1,845,000) (49,297,000) (49,297,000)
Buildings | Impairment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (300,333,000) (300,333,000)  
Impairment losses recognized in profit or loss 0 0  
Transferred to investment property (283,907,000)    
Balance (16,426,000) (300,333,000) (300,333,000)
Plant And Machinery      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 0    
Balance 0 0  
Plant And Machinery | Cost      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 746,042,000 746,042,000  
Additions 0 0  
Transferred to investment property 0    
Disposals 0 0  
Balance 746,042,000 746,042,000 746,042,000
Plant And Machinery | Accumulated depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (349,382,000) (349,382,000)  
Depreciation charge 0 0  
Transferred to investment property 0    
Balance (349,382,000) (349,382,000) (349,382,000)
Plant And Machinery | Impairment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (396,660,000) (396,660,000)  
Impairment losses recognized in profit or loss 0 0  
Transferred to investment property 0    
Balance (396,660,000) (396,660,000) (396,660,000)
Motor vehicles      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 0    
Balance 1,090,000 0  
Motor vehicles | Cost      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 4,225,000 4,225,000  
Additions 1,144,000 0  
Transferred to investment property 0    
Disposals 0 0  
Balance 5,369,000 4,225,000 4,225,000
Motor vehicles | Accumulated depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (3,748,000) (3,748,000)  
Depreciation charge 54,000 0  
Transferred to investment property 0    
Balance (3,802,000) (3,748,000) (3,748,000)
Motor vehicles | Impairment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (477,000) (477,000)  
Impairment losses recognized in profit or loss 0 0  
Transferred to investment property 0    
Balance (477,000) (477,000) (477,000)
Office Equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 68,000    
Balance 160,000 68,000  
Office Equipment | Cost      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance 1,932,000 1,886,000  
Additions 133,000 46,000  
Transferred to investment property 0    
Disposals 0 0  
Balance 2,065,000 1,932,000 1,886,000
Office Equipment | Accumulated depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (1,559,000) (1,547,000)  
Depreciation charge 42,000 12,000  
Transferred to investment property 0    
Balance (1,601,000) (1,559,000) (1,547,000)
Office Equipment | Impairment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance (304,000) (304,000)  
Impairment losses recognized in profit or loss 0 0  
Transferred to investment property 0    
Balance ¥ (304,000) ¥ (304,000) ¥ (304,000)