Note 5 - Land Use Rights: Land use right Table (Details) - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Details
Land use right, gross	$ 2,528,138	$ 2,303,168
Accumulated amortization of Land Use Rights	(533,451)	(448,113)
LandUseRight	$ 1,994,687	$ 1,855,055

Represents the monetary amount of Accumulated amortization of Land Use Rights, as of the indicated date.

No definition available.

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