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INCOME TAXES - Deferred income tax (Details) - CNY (¥)
¥ in Thousands
Sep. 30, 2020
Sep. 30, 2019
Non-current deferred tax assets:    
Net operating loss carry forward ¥ 118,031 ¥ 157,093
Impairment loss 15,272 10,186
Others 11,776 4,644
Non-current deferred income tax assets 141,344 171,923
Valuation allowances (141,344) (171,923)
Net non-current deferred income tax assets ¥ 0 ¥ 0