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SEGMENT INFORMATION (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2022
CNY (¥)
IfrsStatementLineItems [Line Items]          
Revenues from external customers $ 2,944 ¥ 20,306 ¥ 18,735 ¥ 42,498  
Segment (loss)/profit before income tax (2,383) (16,432) (52,836) 24,179  
Income tax expense (850) (5,864) (2,135) (1,258)  
(Loss)/Profit for the year (3,233) (22,296) (54,971) 22,921  
Depreciation of property, plant and equipment (44) (304) (510) (565)  
Depreciation of right-of-use assets (205) (1,413) (1,366) (1,663)  
Amortization of intangible assets (118) (813) (884) (156)  
Fair value gain/(loss) on financial instrument 146 1,007 (38,349) 31,334  
Other income 131 904 (183) 1,616  
Finance costs (492) (3,395) (4,359) (3,749)  
Finance income 2,263 15,607 16,935 15,468  
Segment assets 57,987   413,382 527,136 ¥ 399,991
Deferred income tax assets     66 2,920
Total assets 46,388   333,448 530,056 319,991
Segment liabilities 29,942   219,613 209,219 206,534
Deferred income tax liabilities 765   2,544 10,426 5,276
Income tax payable 1,556   9,254 18,612 10,732
Total liabilities 20,664   151,411 238,257 142,542
Elimination of intersegment receivables     (80,000)   (80,000)
Elimination of inter-segment payables (11,599)   (80,000)   (80,000)
Consultants shares option expense (2,342) (16,152)      
Deferred income tax assets | $ (11,599)        
Trade receivables [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets 578 3,989 (3,840) (4,544)  
Contract assets [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets (25) (171) (357) (172)  
Amount Due From Related Companies [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets     1,106 554  
Other Receivable [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets (397) (2,745) (239)    
Wastewater Treatment [Member]          
IfrsStatementLineItems [Line Items]          
Revenues from external customers 2,944 20,306 18,735 35,631  
Segment (loss)/profit before income tax 1,414 9,758 (7,216) (112)  
Depreciation of property, plant and equipment (40) (275) (445) (500)  
Depreciation of right-of-use assets (104) (713) (647) (687)  
Amortization of intangible assets (118) (813) (884) (156)  
Fair value gain/(loss) on financial instrument  
Other income 30 206 (782) 1,415  
Finance costs (519) (3,582) (4,192) (3,687)  
Finance income 2,261 15,594 13,537 15,449  
Segment assets 45,264   390,895 337,050 312,229
Segment liabilities 15,526   113,124 116,140 107,096
Consultants shares option expense      
Wastewater Treatment [Member] | Trade receivables [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets 578 3,989 (3,840) (4,544)  
Wastewater Treatment [Member] | Contract assets [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets (25) (171) (357) (172)  
Wastewater Treatment [Member] | Amount Due From Related Companies [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets     775 334  
Wastewater Treatment [Member] | Other Receivable [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets    
Exploration and Mining [Member]          
IfrsStatementLineItems [Line Items]          
Revenues from external customers 6,867  
Segment (loss)/profit before income tax (6) (39) (161) (682)  
Depreciation of property, plant and equipment (4) (28) (62) (62)  
Depreciation of right-of-use assets  
Amortization of intangible assets  
Fair value gain/(loss) on financial instrument  
Other income 101 697 600 200  
Finance costs (1) (1) (1)  
Finance income 1 1  
Segment assets 41   321 39 286
Segment liabilities 478   3,294 3,013 3,298
Consultants shares option expense      
Exploration and Mining [Member] | Trade receivables [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets    
Exploration and Mining [Member] | Contract assets [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets    
Exploration and Mining [Member] | Amount Due From Related Companies [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets      
Exploration and Mining [Member] | Other Receivable [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets    
Corporate Activities [Member]          
IfrsStatementLineItems [Line Items]          
Revenues from external customers  
Segment (loss)/profit before income tax (3,791) (26,151) (45,459) 24,973  
Depreciation of property, plant and equipment (1) (3) (3)  
Depreciation of right-of-use assets (101) (700) (719) (976)  
Amortization of intangible assets  
Fair value gain/(loss) on financial instrument 146 1,007 (38,349) 31,334  
Other income 1 (1) 1  
Finance costs 27 188 (166) (61)  
Finance income 2 13 3,397 18  
Segment assets 12,682   22,166 190,047 87,476
Segment liabilities 13,938   103,195 90,066 ¥ 96,140
Consultants shares option expense (2,342) (16,152)      
Corporate Activities [Member] | Trade receivables [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets    
Corporate Activities [Member] | Contract assets [member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets    
Corporate Activities [Member] | Amount Due From Related Companies [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets     331 ¥ 220  
Corporate Activities [Member] | Other Receivable [Member]          
IfrsStatementLineItems [Line Items]          
Impairment (losses)/reversal on financial assets $ (397) ¥ (2,745) ¥ (239)