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RELATED PARTY BALANCES AND TRANSACTIONS - Transactions with related parties (Details) - CNY (¥)
¥ in Thousands
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Sales      
Related Party Transaction      
Related party transaction amounts of transaction ¥ 8,015 ¥ 7,835 ¥ 15,927
Purchases      
Related Party Transaction      
Related party transaction amounts of transaction 23,749 19,326 17,450
Linze Origin Seeds Ltd | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction   4,706 3,416
Beijing Shihui | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction   360  
Ying De | Sales      
Related Party Transaction      
Related party transaction amounts of transaction 1,818 3,134 5,315
Ying De | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction 14,012 11,700 10,975
The Close family of the Company's Chairman | Sales      
Related Party Transaction      
Related party transaction amounts of transaction 2,618    
The Close family of the Company's Chairman | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction 29 333 32
NCI | Sales      
Related Party Transaction      
Related party transaction amounts of transaction 3,574 4,701 10,612
NCI | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction   ¥ 2,227 2,861
Henan Agriculture University | Sales      
Related Party Transaction      
Related party transaction amounts of transaction 5    
Denong | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction     ¥ 166
Liantaide | Purchases      
Related Party Transaction      
Related party transaction amounts of transaction ¥ 9,708