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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-controlling interests (Details) - USD ($)
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Noncontrolling Interest [Line Items]    
Acquisition of Noncontrolling interest $ 706,659  
Noncontrolling interests $ 1,809,852 $ 2,743,273
Chengdu QLS and subsidiaries    
Noncontrolling Interest [Line Items]    
Acquired equity interest, subsidiaries, percentage 7.76%  
Chengdu QLS and subsidiaries    
Noncontrolling Interest [Line Items]    
Equity interest, percentage 79.51% 71.75%
Gansu QLS    
Noncontrolling Interest [Line Items]    
Ownership interest (in percent) 0.786% 1.703%
Noncontrolling interests $ 240,683 $ 387,420
Chengdu QLS and subsidiaries    
Noncontrolling Interest [Line Items]    
Ownership interest (in percent) 20.49% 28.25%
Noncontrolling interests $ 1,569,169 $ 2,355,853