Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details

Summary of Significant Accounting Policies - Schedule of Revenue by Major Product Line (Details) - USD ($)	6 Months Ended		12 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Product Information [Line Items]
Revenue	$ 18,585,525	$ 5,498,653	$ 12,949,345	$ 11,542,292	$ 9,447,334
Wastewater Treatment Revenue [Member]
Product Information [Line Items]
Revenue	9,186,084	493,123	4,163,965	2,468,097	2,355,126
River Water Quality Management Revenue [Member]
Product Information [Line Items]
Revenue	4,297,180	4,728,449	6,619,693	6,864,631	4,436,214
Product Sales Revenue [Member]
Product Information [Line Items]
Revenue	1,344,830	277,081	2,091,469	2,192,864	2,648,445
Training Revenue [Member]
Product Information [Line Items]
Revenue	3,502,890	0
Others [Member]
Product Information [Line Items]
Revenue	$ 254,541	$ 0	$ 74,218	$ 16,700	$ 7,549