Note 8 - Related Party Transactions (Details) - USD ($)	3 Months Ended	6 Months Ended
Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Apr. 30, 2016
Details
Accounts receivable - related party Qufu Shengwang	$ 3,069,485		$ 3,069,485		$ 3,632,876
Revenue - related party Qufu Shengwang	1,948,631	$ 782,398	3,462,369	$ 3,858,054
Interest expense related to due to related parties	$ 32,468	$ 58,113	$ 32,246	$ 73,712

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:	debit
Period Type:	duration