Long-Term Investment (Details) - USD ($)	Jul. 31, 2022	May 31, 2022	Apr. 30, 2022
Solarever [Member]
Long-Term Investment (Details) [Line Items]
Investment	$ 185,000		$ 2,000,000
Equity interest	0.49%		5.25%
Armstrong [Member]
Long-Term Investment (Details) [Line Items]
Investment	$ 150,000	$ 2,000,000
Equity interest	0.90%	12.00%