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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-controlling interests (Details) - USD ($)
Sep. 30, 2022
Sep. 30, 2021
Noncontrolling Interest [Line Items]    
Noncontrolling interests $ 1,911,394 $ 1,809,852
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% 0.786%
Noncontrolling interests $ 237,397 $ 240,683
Chengdu QLS and subsidiaries    
Noncontrolling Interest [Line Items]    
Ownership interest (in percent) 20.49% 20.49%
Noncontrolling interests $ 1,673,997 $ 1,569,169