Condensed Consolidated Statements of Changes in Equity - USD ($)	Preferred Stock	Common Stock	Additional Paid-in Capital	Statutory Reserve	Retained Earnings	Accumulated Other Comprehensive Gain (Loss)	Noncontrolling Interest	Total
Balance at Mar. 31, 2020		$ 11,325	$ 15,235,025	$ 212,739	$ 38,997,177	$ (8,324)	$ 303,209	$ 54,751,151
Balance (in 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 payment					(566,250)			(566,250)
Foreign currency translation loss						(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 (in Shares) at Jun. 30, 2020		11,325,000
Balance at Mar. 31, 2021		$ 11,333	15,301,268	346,315	40,748,314	(15,901)	302,120	56,693,449
Balance (in Shares) at Mar. 31, 2021		11,332,974
Stock-based compensation expense for the stock options issued under stock incentive plan			517					517
Cashless exercise of warrants		$ 1	(1)
Cashless exercise of warrants (in Shares)		1,344
Net income (loss)					1,934,683		(17)	1,934,666
Dividend payment					(566,649)			(566,649)
Foreign currency translation loss						79,988		79,988
Balance at Jun. 30, 2021		$ 11,334	$ 15,301,784	$ 346,315	$ 42,116,348	$ 64,087	$ 302,103	$ 58,141,971
Balance (in Shares) at Jun. 30, 2021		11,334,318