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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentrations of risks (Details) - USD ($)	6 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Concentrations of risks
Cash held in major financial institutions	$ 187,061		$ 410,716	$ 122,067
Revenue | Customer Concentration Risk | Customer A
Concentrations of risks
Concentration risk percentage	32.90%	43.40%	35.60%	43.10%
Revenue | Customer Concentration Risk | Customer B
Concentrations of risks
Concentration risk percentage		10.40%		10.60%
Revenue | Customer Concentration Risk | Customer C
Concentrations of risks
Concentration risk percentage	13.60%				14.10%
Revenue | Customer Concentration Risk | Customer D
Concentrations of risks
Concentration risk percentage	10.20%				11.70%
Revenue | Customer Concentration Risk | Customer E
Concentrations of risks
Concentration risk percentage					11.30%
Accounts receivable | Credit Concentration Risk | Customer A
Concentrations of risks
Concentration risk percentage	47.80%		36.90%
Accounts receivable | Credit Concentration Risk | Customer B
Concentrations of risks
Concentration risk percentage	16.90%		15.20%	10.30%
Accounts receivable | Credit Concentration Risk | Customer C
Concentrations of risks
Concentration risk percentage			12.30%
Accounts receivable | Credit Concentration Risk | Customer D
Concentrations of risks
Concentration risk percentage	11.30%			21.80%
Accounts receivable | Credit Concentration Risk | Customer E
Concentrations of risks
Concentration risk percentage				27.00%
Accounts receivable | Credit Concentration Risk | Customer F
Concentrations of risks
Concentration risk percentage				12.60%
Purchase | Supplier Concentration Risk | Supplier A
Concentrations of risks
Concentration risk percentage		41.50%	28.60%
Purchase | Supplier Concentration Risk | Supplier B
Concentrations of risks
Concentration risk percentage	22.00%	13.80%	19.10%	47.80%
Purchase | Supplier Concentration Risk | Supplier C
Concentrations of risks
Concentration risk percentage	31.70%	13.20%		12.40%
Purchase | Supplier Concentration Risk | Supplier D
Concentrations of risks
Concentration risk percentage		11.10%		11.80%	14.50%
Purchase | Supplier Concentration Risk | Supplier E
Concentrations of risks
Concentration risk percentage	10.50%				11.60%
Purchase | Supplier Concentration Risk | Supplier F
Concentrations of risks
Concentration risk percentage	18.30%				10.80%
Purchase | Supplier Concentration Risk | Supplier G
Concentrations of risks
Concentration risk percentage					39.80%
Accounts payable | Supplier Concentration Risk | Supplier A
Concentrations of risks
Concentration risk percentage	54.00%		33.40%
Accounts payable | Supplier Concentration Risk | Supplier B
Concentrations of risks
Concentration risk percentage			11.20%
Accounts payable | Supplier Concentration Risk | Supplier C
Concentrations of risks
Concentration risk percentage	13.00%			49.40%
Accounts payable | Supplier Concentration Risk | Supplier D
Concentrations of risks
Concentration risk percentage				23.80%
Accounts payable | Supplier Concentration Risk | Supplier E
Concentrations of risks
Concentration risk percentage				18.00%

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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