Note 7 - Related Party Transactions (Details) - USD ($)	12 Months Ended
Apr. 30, 2017	Apr. 30, 2016
Details
Revenue - related party Qufu Shengwang	$ 5,855,594	$ 8,698,333
Accounts receivable - related party Qufu Shengwang	339,270	3,632,876
Advances from related parties for working capital	2,613,077	8,692,073
Repaid to related parties for working capital	3,848,626	8,184,835
Interest expense related to due to related parties	$ 138,092	$ 158,631

Represents the monetary amount of Accounts receivable - related party Qufu Shengwang, as of the indicated date.

No definition available.

Name:	fil_AccountsReceivableRelatedPartyQufuShengwang
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the monetary amount of Advances from related parties for working capital, during the indicated time period.

No definition available.

Name:	fil_AdvancesFromRelatedPartiesForWorkingCapital
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the monetary amount of Interest expense related to due to related parties, during the indicated time period.

No definition available.

Name:	fil_InterestExpenseRelatedToDueToRelatedParties
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the monetary amount of Repaid to related parties for working capital, during the indicated time period.

No definition available.

Name:	fil_RepaidRelatedPartiesForWorkingCapital
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the monetary amount of Revenue - related party Qufu Shengwang, during the indicated time period.

No definition available.

Name:	fil_RevenueRelatedPartyQufuShengwang
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

No definition available.