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CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Parenthetical) - CNY (¥)
¥ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Income Statement [Abstract]      
Revenue from related parties ¥ 37,987 ¥ 7,848 ¥ 0