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CONCENTRATIONS (Details)
$ in Millions
12 Months Ended
Jun. 30, 2022
CNY (¥)
Jun. 30, 2021
CNY (¥)
Jun. 30, 2020
Jun. 30, 2022
USD ($)
Jun. 30, 2022
HKD ($)
China          
Concentration Risk [Line Items]          
Cash was on deposit at financial institutions ¥ 20,300,000 ¥ 18,800,000   $ 3.0  
Maximum insured bank deposit | ¥ 500,000        
Unprotected cash held in banks 17,800,000 16,300,000   2.7  
Hong Kong          
Concentration Risk [Line Items]          
Cash was on deposit at financial institutions 297,200,000 325,100,000   44.4  
Maximum insured bank deposit | $         $ 500,000
Unprotected cash held in banks ¥ 296,800,000 ¥ 324,700,000   $ 44.3  
China National Petroleum Corporation | Customer concentration | Sales revenue          
Concentration Risk [Line Items]          
Concentration risk, percentage 50.00% 39.00% 39.00%    
China National Petroleum Corporation | Customer concentration | Accounts Receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage 49.00% 29.00% 36.00%    
SINOPEC | Customer concentration | Sales revenue          
Concentration Risk [Line Items]          
Concentration risk, percentage 28.00% 22.00%      
SINOPEC | Customer concentration | Accounts Receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage 22.00% 13.00%      
Another Customer | Customer One | Sales revenue          
Concentration Risk [Line Items]          
Concentration risk, percentage     31.00%    
Another Customer | Customer One | Accounts Receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage   19.00% 11.00%    
Another Customer | Customer Two | Sales revenue          
Concentration Risk [Line Items]          
Concentration risk, percentage     17.00%    
Another Customer | Customer Two | Accounts Receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage   14.00% 10.00%    
Another Customer | Customer concentration | Sales revenue          
Concentration Risk [Line Items]          
Concentration risk, percentage 10.00%        
Another Customer | Customer concentration | Accounts Receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage 14.00%