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SEGMENT REPORTING (Details)
¥ in Thousands, $ in Thousands
 1 Months Ended 12 Months Ended
Jan. 31, 2018
CNY (¥)
Dec. 31, 2025
CNY (¥)
segment
Dec. 31, 2025
USD ($)
segment
Dec. 31, 2024
CNY (¥)
segment
Dec. 31, 2023
CNY (¥)
SEGMENT REPORTING          
Number of reportable segments | segment   2 2 2  
Revenue   ¥ 107,898 $ 15,429 ¥ 111,714 ¥ 174,045
Cost of revenue   (106,089) (15,170) (113,318) (213,179)
Product development   (9,798) (1,401) (856) (1,970)
Sales and marketing   (33,951) (4,855) (246) (1,729)
General and administrative   (205,816) (29,431) (157,832) (196,790)
Impairment Loss of equipment   0   (6,505) (161,002)
Realized gain on exchange cryptocurrencies   10,627 1,520 60,783 42,836
Fair value change on cryptocurrencies   (36,178) (5,173) 48,290 40,036
Segment profit (loss)   (281,114) (40,197) (58,764) (317,753)
Reconciliation of segment profit (loss):          
Loss on disposal of subsidiaries   (1,502) (215) (11,606) (282)
Impairment on equity investments ¥ (1,300) (41,629) (6,000) 0 0
Interest income   449 64    
Interest expenses   (23,264) (3,327) (34,224) (31,379)
Gain (loss) on fair value of derivative, option assets and liabilities   (5,733) (820) 45,037 23,171
Gain on debt relief of WoW         175,302
Gain from discontinued operations, net         156,853
Share of loss in equity method investments   600 82 1,122 0
Income tax expense   110 16    
Net income (loss)   (408,916) (58,474) (73,642) 12,576
Operating Segments          
SEGMENT REPORTING          
Revenue   107,898 15,429 111,714 174,045
Cost of revenue   (106,089) (15,170) (113,318) (213,179)
Product development   (9,798) (1,401) (856) (1,970)
Sales and marketing   (33,951) (4,855) (246) (1,729)
General and administrative   (205,816) (29,431) (157,832) (196,790)
Impairment on advance and other assets   (7,807) (1,116) (794)  
Impairment Loss of equipment       (6,505) (161,002)
Realized gain on exchange cryptocurrencies   10,627 1,520 60,783 42,836
Fair value change on cryptocurrencies   (36,178) (5,173) 48,290 40,036
Segment profit (loss)   (281,114) (40,197) (58,764) (317,753)
Reconciliation of segment profit (loss):          
Loss on disposal of subsidiaries   (1,502) (215) (11,606) (282)
Impairment on equity investments   (41,629) (5,953)    
Impairment on other investments   (64,960) (9,289) (7,160) 3,490
Interest income   449 64    
Interest expenses   (23,264) (3,327) (34,224) (31,379)
Gain (loss) on fair value of derivative, option assets and liabilities   (5,733) (820) 45,037 23,171
Gain on debt relief of WoW         175,302
Other income (expenses), net   9,518 1,361 (5,803) 3,174
Gain from discontinued operations, net         156,853
Share of loss in equity method investments   (571) (82) (1,122)  
Income tax expense   (110) (16)    
Net income (loss)   (408,916) $ (58,474) (73,642) 12,576
Operating Segments | Cryptocurrency Mining          
SEGMENT REPORTING          
Revenue   56,352   110,739 168,324
Cost of revenue   (67,960)   (106,464) (191,928)
Product development         (243)
General and administrative   (21,657)   (49,127) (61,312)
Impairment on advance and other assets   (6,529)      
Impairment Loss of equipment       (6,505) (161,002)
Realized gain on exchange cryptocurrencies   10,627   60,783 42,836
Fair value change on cryptocurrencies   (36,178)   48,290 40,036
Segment profit (loss)   (65,345)   57,716 (163,289)
Operating Segments | Online game services          
SEGMENT REPORTING          
Revenue   51,546   975 5,721
Cost of revenue   (38,129)   (6,854) (21,251)
Product development   (9,798)   (856) (1,727)
Sales and marketing   (33,951)   (246) (1,729)
General and administrative   (184,159)   (108,705) (135,478)
Impairment on advance and other assets   (1,278)   (794)  
Segment profit (loss)   ¥ (215,769)   ¥ (116,480) ¥ (154,464)