NOTE 6 - RELATED PARTY TRANSACTIONS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019	Dec. 12, 2019	Apr. 30, 2019
Details
Accounts receivable - related party Qufu Shengwang	$ 2,644,820		$ 2,644,820			$ 2,477,659
Revenue from related party - Qufu Shengwang	1,784,135	$ 1,955,319	5,882,694	$ 5,671,819
Cost of Revenue from related party - Qufu Shengwang	1,081,379	1,124,137	3,195,115	3,022,288
Advances from related parties for working capital			4,980,422	3,589,014
Repaid to related parties for working capital			6,215,431	666,121
Interest expense related to due to related parties	32,023	$ 35,855	96,123	$ 101,546
Repayment to related party					$ 1,149,394
Due to Pharmaceutical Corporation	4,447,574		4,447,574			5,669,776
Due to Qufu Shengwang	357,891		357,891			557,976
Due to Weidong Chai	188,159		188,159			180,769
Total Due to Related Party	4,993,624		4,993,624			$ 6,408,521
Working capital advances from related parties - Shangdong	3,843,443		3,843,443
Working capital advances from related parties - Qufu	1,095,764		1,095,764
Working capital advances from related parties - Weidong Chai	41,215		41,215
Working capital advances from related parties	4,980,422		4,980,422
Repayments from related parties - Shandong	(4,908,085)		(4,908,085)
Repayments from related parties - Qufu	(1,278,716)		(1,278,716)
Repayments from related parties - Weidong Chai	(28,630)		(28,630)
Repayments from related parties	(6,215,431)		(6,215,431)
Effect of foreign currency exchange - Shangdong	(157,560)		(157,560)
Effect of foreign currency exchange - Qufu	(17,133)		(17,133)
Effect of foreign currency exchange - Weidong Chai	(5,195)		(5,195)
Effect of foreign currency exchange	$ (179,888)		$ (179,888)