Percentage of value added tax.

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Amount of impairment loss for asset. Includes, but is not limited to, tangible and intangible assets and goodwill.

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Amount of cash and cash equivalent, held in foreign currency. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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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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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount of expense for employee benefit and equity-based compensation.

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Amount of increase (decrease) in income from government assistance, classified as nonoperating.

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Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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Amount of cash and cash equivalent restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Summary of Significant Accounting Policies (Details)	12 Months Ended
Summary of Significant Accounting Policies (Details)	Mar. 31, 2026 USD ($)	Mar. 31, 2026 CNY (¥)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Summary of Significant Accounting Policies [Line Items]
Restricted cash	$ 10,227		$ 9,413
Inventory write-down	68,783		128,241	$ 188,268
Impairments
Advance from customers	317,751		141,737
Revenue recognized on advance from customer	141,737		207,293	186,874
Government subsidies received			207,257	7,255
Employee social security and welfare benefits	537,888		531,728	$ 372,130
Underpayment tax	15	¥ 100
Cash and restricted cash	1,219,148		691,695
Cash and restricted cash	$ 2,884,957		$ 3,002,761
Mainland China [Member]
Summary of Significant Accounting Policies [Line Items]
Value added tax percentage	13.00%	13.00%
Netherlands [Member]
Summary of Significant Accounting Policies [Line Items]
Value added tax percentage	21.00%	21.00%	21.00%	21.00%
Hong Kong [Member]
Summary of Significant Accounting Policies [Line Items]
Value added tax percentage
Customer Concentration Risk [Member] \| One Customer [Member] \| Total Revenue [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percentage	16.40%	16.40%	14.50%	17.40%
Customer Concentration Risk [Member] \| One Customer [Member] \| Accounts Receivable [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percentage	16.20%	16.20%	12.30%
Customer Concentration Risk [Member] \| Two Customers [Member] \| Total Revenue [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percentage	10.10%	10.10%	11.90%	12.70%
Customer Concentration Risk [Member] \| Two Customers [Member] \| Accounts Receivable [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percentage			10.60%
Customer Concentration Risk [Member] \| Three Customers [Member] \| Total Revenue [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percentage			10.40%
Supplier Concentration Risk [Member] \| Total Purchases [Member] \| Supplier One [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percentage				12.10%
Supplier Concentration Risk [Member] \| Accounts Payable [Member] \| Supplier One [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percentage	10.90%	10.90%	12.20%