NOTE 9 - ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) - USD ($)	Jan. 31, 2020	Apr. 30, 2019
Details
General liability, worker's compensation, and medical insurance payable	$ 410,091	$ 448,528
Consulting fee payable	122,507	136,770
Union and education fees payable	127,838	131,688
Interest payables for short-term loans	650,708	765,061
Advanced from the employees	397,943	221,081
Security deposit for sub-contractor	144,161
Other miscellaneous payables	$ 615,857	$ 100,844

Represents the monetary amount of Advanced from the employees, as of the indicated date.

No definition available.

Name:	fil_AdvancedFromTheEmployees
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Consulting fee payable, as of the indicated date.

No definition available.

Represents the monetary amount of General liability, worker's compensation, and medical insurance payable, as of the indicated date.

No definition available.

Name:	fil_GeneralLiabilityWorkerSCompensationAndMedicalInsurancePayable
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Interest payables for short-term loans, as of the indicated date.

No definition available.

Name:	fil_InterestPayablesForShortTermLoans
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Other miscellaneous payables, as of the indicated date.

No definition available.

Name:	fil_OtherMiscellaneousPayables
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Security deposit for sub-contractor, as of the indicated date.

No definition available.

Name:	fil_SecurityDepositForSubContractor
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Union and education fees payable, as of the indicated date.

No definition available.

Name:	fil_UnionAndEducationFeesPayable
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

No definition available.