NOTE 10 - ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) - USD ($)	Jul. 31, 2020	Apr. 30, 2020
Details
General liability, worker's compensation, and medical insurance payable	$ 404,780	$ 409,811
Consulting fee payable	212,238	256,304
Union and education fees payable	127,139	125,800
Interest payables for short-term loans	325,831	129,976
Safety production fund payable	171,083	140,274
Advanced from the employees	284,453	98,775
Security deposit for sub-contractor	143,373	141,864
Other miscellaneous payables	$ 553,922	$ 205,708