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REVENUE AND OTHER INCOME - Operations by business segment (Details) - CNY (¥)
¥ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Disclosure Of Operating Segments (Line Items)      
Total revenues ¥ 134,961 ¥ 50,107  
Total cost of revenues 135,365 56,610  
Net loss (25,746) (70,769)  
Operating segments | Revenues      
Disclosure Of Operating Segments (Line Items)      
Total revenues 134,961 50,107  
Operating segments | Revenues | Sale of ceramic tile products      
Disclosure Of Operating Segments (Line Items)      
Total revenues 16,715 42,186  
Operating segments | Revenues | Business management and consulting revenue      
Disclosure Of Operating Segments (Line Items)      
Total revenues 118,246 7,921  
Operating segments | Cost of revenues      
Disclosure Of Operating Segments (Line Items)      
Total cost of revenues 135,365 56,610  
Operating segments | Cost of revenues | Sale of ceramic tile products      
Disclosure Of Operating Segments (Line Items)      
Total cost of revenues 19,024 53,790  
Operating segments | Cost of revenues | Business management and consulting revenue      
Disclosure Of Operating Segments (Line Items)      
Total cost of revenues 116,341 2,820  
Operating segments | Operating costs and expenses      
Disclosure Of Operating Segments (Line Items)      
Total operating costs and expenses 25,259 64,259  
Operating segments | Operating costs and expenses | Sale of ceramic tile products      
Disclosure Of Operating Segments (Line Items)      
Total operating costs and expenses 24,247 50,709  
Operating segments | Operating costs and expenses | Business management and consulting revenue      
Disclosure Of Operating Segments (Line Items)      
Total operating costs and expenses (1,068) 1,977  
Operating segments | Operating costs and expenses | Others      
Disclosure Of Operating Segments (Line Items)      
Total operating costs and expenses 2,080 11,573  
Operating segments | Net loss | Sale of ceramic tile products      
Disclosure Of Operating Segments (Line Items)      
Net loss (26,556) 68,094  
Operating segments | Net loss | Business management and consulting revenue      
Disclosure Of Operating Segments (Line Items)      
Net loss 2,890 (3,115)  
Operating segments | Net loss | Others      
Disclosure Of Operating Segments (Line Items)      
Net loss (2,080) 5,790  
Operating segments | Loss (income) from operations      
Disclosure Of Operating Segments (Line Items)      
Net loss (25,746) ¥ 70,769  
Operating segments | Segment assets      
Disclosure Of Operating Segments (Line Items)      
Total assets 135,242   ¥ 177,867
Operating segments | Segment assets | Sale of ceramic tile products      
Disclosure Of Operating Segments (Line Items)      
Total assets 105,979   147,890
Operating segments | Segment assets | Business management and consulting revenue      
Disclosure Of Operating Segments (Line Items)      
Total assets 26,053   27,222
Operating segments | Segment assets | Others      
Disclosure Of Operating Segments (Line Items)      
Total assets ¥ 3,210   ¥ 2,755