Note 3 - Operating Leases: Schedule of Components of Prepaid Leases (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017
Prepaid Lease, Current	$ 741,583	$ 900,547
Prepaid Lease, Noncurrent	641,349	1,265,252
Land
Prepaid Lease, Current	739,492	898,641
Prepaid Lease, Noncurrent	636,122	1,258,582
Shiqiao Village | Land
Prepaid Lease, Current	103,370	289,884
Prepaid Lease, Noncurrent	0	72,471
Shandong Wanziyuan | Land
Prepaid Lease, Current	318,061	289,884
Prepaid Lease, Noncurrent	238,546	507,298
Zhongce No.4 Village | Land
Prepaid Lease, Current	0	28,989
Prepaid Lease, Noncurrent	0	26,573
Zhongce Shen Village | Land
Prepaid Lease, Current	318,061	289,884
Prepaid Lease, Noncurrent	397,576	652,240
Shandong Yongchuntang | Automobiles
Prepaid Lease, Current	2,091	1,906
Prepaid Lease, Noncurrent	$ 5,227	$ 6,670