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PLANT AND EQUIPMENT, NET - Additional information (Details) - CNY (¥)
¥ in Millions
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
PLANT AND EQUIPMENT, NET      
Depreciation expenses ¥ 2.7 ¥ 6.8 ¥ 9.1