Condensed Consolidated Statements of Changes in Equity - USD ($)	Preferred Stock	Common Stock	Additional Paid-in Capital	Statutory Reserve	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Total
Balance at Mar. 31, 2019		$ 11,325	$ 14,956,767	$ 212,739	$ 34,786,735	$ (14,440)	$ 309,003	$ 54,751,151
Balance, shares at Mar. 31, 2019		11,325,000
Net income (loss)					1,549,488			1,549,488
Dividend distribution					(566,250)			(566,250)
Foreign currency translation gain						811		811
Balance at Jun. 30, 2019		$ 11,325	15,235,025	212,739	38,997,177	(8,324)	303,209	54,751,151
Balance, shares at Jun. 30, 2019		11,325,000
Balance at Mar. 31, 2020		$ 11,325	15,235,025	212,739	38,997,177	(8,324)	303,209	54,751,151
Balance, shares at Mar. 31, 2020		11,325,000
Stock-based compensation expense for the stock options issued under stock incentive plan.			42,151					42,151
Net income (loss)					813,859		(6)	813,853
Dividend distribution					(566,250)			(566,250)
Foreign currency translation gain						(553)		(553)
Balance at Jun. 30, 2020		$ 11,325	$ 15,277,176	$ 212,739	$ 39,244,786	$ (8,877)	$ 303,203	$ 55,040,352
Balance, shares at Jun. 30, 2020		11,325,000