CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (4,593,588)	$ (5,249,275)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization expenses	1,475,366	1,339,581
Allowance for doubtful accounts	0	13,051
Provisions for obsolete inventories	331,443	1,276,893
Loss on disposition of property and equipment	590,503	0
Changes in operating assets and liabilities
Accounts receivable	151,365	1,195,885
Accounts receivable - related party	0	(2,585,789)
Inventories	6,994,959	(217,854)
Prepaid expenses and other current assets	(2,174,918)	95,376
Accounts payable and accrued expenses	(5,161,431)	1,890,082
Taxes payable	501,451	38,442
NET CASH USED IN OPERATING ACTIVITIES	(1,884,850)	(2,203,608)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(412,935)	(765,549)
Purchases of land use rights	(2,068,020)	0
Proceed from disposal of equipment	9,105	0
NET CASH USED IN INVESTING ACTIVITIES	(2,471,850)	(765,549)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from loans	2,628,506	20,792
Repayment of short-term loans	(780,007)	(922,255)
Advance from related parties	4,851,127	13,211,425
Repayment of related party advances	(3,591,580)	(9,017,852)
NET CASH PROVIDED BY FINANCING ACTIVITIES	3,108,046	3,292,110
EFFECT OF EXCHANGE RATE ON CASH	4,018	104,956
NET (DECREASE) INCREASE IN CASH	(1,244,636)	427,909
Cash at the beginning of year	1,565,829	1,137,920
Cash at the end of year	321,193	1,565,829
SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION
Cash paid for interest	31,352	23,846
NON-CASH INVESTING AND FINANCING ACTIVITIES
Property and equipment acquired on credit as payable	3,543	6,243
Payment for equipment offsets part of rental income	0	54,860
Accrued interest enrolled into debt	213,866	203,126
Accrued interest payable to related party	$ 22,215	$ 19,226