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RELATED PARTY BALANCES AND TRANSACTIONS - Transactions with related parties (Details) - CNY (¥)
¥ in Thousands
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Sales      
Related Party Transaction      
Related party transaction amounts of transaction ¥ 2,697 ¥ 11,061 ¥ 8,015
Purchases      
Related Party Transaction      
Related party transaction amounts of transaction 13,249 6,496 23,749
Ying De | Sales      
Related Party Transaction      
Related party transaction amounts of transaction 0 6,384 1,818
Ying De | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction   162 14,012
Shareholders | Sales      
Related Party Transaction      
Related party transaction amounts of transaction ¥ 2,682 ¥ 4,677 ¥ 3,574
Percentage of company's sale 2.00% 5.00% 7.00%
Shareholders | Borrowing      
Related Party Transaction      
Related party transaction amounts of transaction ¥ 935 ¥ 3,229 ¥ 2,682
Shareholders | Borrowing | Minimum      
Related Party Transaction      
Borrowing interest rate 5.80%    
Shareholders | Borrowing | Maximum      
Related Party Transaction      
Borrowing interest rate 10.00%    
Henan Agriculture University | Sales      
Related Party Transaction      
Related party transaction amounts of transaction ¥ 0   5
The Close family of the Company's Chairman | Sales      
Related Party Transaction      
Related party transaction amounts of transaction 0   2,618
The Close family of the Company's Chairman | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction     29
Liantaide | Sales      
Related Party Transaction      
Related party transaction amounts of transaction 15    
Liantaide | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction 13,249 6,334 9,708
Non-controlling shareholders ("NCI") | Interest accrual      
Related Party Transaction      
Related party transaction amounts of transaction ¥ 444 ¥ 468 ¥ 272