Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Advances from customers (Details 1)	6 Months Ended		12 Months Ended
Advances from customers (Details 1)	Sep. 30, 2025 CNY (¥)	Sep. 30, 2024 CNY (¥)	Mar. 31, 2025 CNY (¥)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 CNY (¥)	Mar. 31, 2023 CNY (¥)	Mar. 31, 2025 USD ($)	Mar. 31, 2025 CNY (¥)
Offsetting Assets [Line Items]
Total advances from customers	¥ 8,651,000				¥ 27,893,632		$ 1,475,309	¥ 10,502,722
Increase in customer advances	0		¥ 37,210,548
Revenue recognized	1,851,722	¥ (27,893,632)	(54,601,458)	$ (3,918,195)	(27,893,632)	¥ (1,082,404)
P O S Devices Pre Sale [Member]
Offsetting Assets [Line Items]
Total advances from customers					27,893,632		0	0
Increase in customer advances			26,088,548
Revenue recognized			(53,982,180)
D A K A Regional Agent Fee [Member]
Offsetting Assets [Line Items]
Total advances from customers	8,651,000				¥ 0		$ 1,475,309	¥ 10,502,722
Increase in customer advances	0		11,122,000
Revenue recognized	¥ (1,851,722)		¥ (619,278)