Interest expense (Tables)

12 Months Ended

Mar. 31, 2022

Interest and Debt Expense [Abstract]

Summary of Interest Expense

	Year ended March 31, 2020		Year ended March 31, 2021		Year ended March 31, 2022
	RMB		RMB		RMB
Amortization charges on promissory notes		56,290		21,611		17,144
Interest expense on borrowings		2,815		6,039		3,740
Others		163		—		—
Total		59,268		27,650		20,884