CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (2,642,890)	$ (1,714,278)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization expenses	736,823	626,560
Loss on disposition of property and equipment	386,687	0
Provisions for obsolete inventories	653,505	0
Changes in operating assets and liabilities:
Accounts receivable and notes receivable	317,355	647,614
Accounts receivable - related party	0	1,677,074
Inventories	3,141,942	(1,679,993)
Prepaid expenses and other current assets	(3,560,027)	(320,653)
Accounts payable and accrued expenses	(1,488,413)	1,074,321
Taxes payable	9,263	(88,526)
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	(2,445,755)	222,119
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(150,258)	(97,289)
Purchases of land use rights	(2,055,960)
NET CASH USED IN INVESTING ACTIVITIES	(2,198,190)	(97,289)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from short term loans	1,008,096	0
Repayment of short term loans	0	(678,362)
Advance from related parties	6,302,619	7,538,516
Repayment of related party advances	(3,541,521)	(7,755,243)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	3,769,194	(895,089)
EFFECT OF EXCHANGE RATE ON CASH	7,557	28,918
NET DECREASE IN CASH	(867,194)	(741,341)
Cash at the beginning of period	1,565,829	1,137,920
Cash at the end of period	698,635	396,579
SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION:
Cash paid for income taxes	0	0
Cash paid for interest	4,885	17,077
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Property and equipment acquired on credit as payable	30,773	244,896
Accrued interest payable to related party	$ 171,944	$ 8,897