Taxes (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 22, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Taxes (Textual)
Estimated net operating loss carry forwards for U.S. income tax purposes		$ 1,589,447		$ 1,589,447		$ 1,164,735
Effective tax rate		0.50%	(2.20%)	(0.50%)	(2.40%)
Foreign tax credit				$ 195,000
Income tax, description	The U.S. federal statutory rate from 35% to 21%, effective on January 1, 2018. ASC 740 requires companies to recognize the effect of tax law changes in the period of enactment, accordingly, the effects must be recognized on companies' calendar year-end financial statements, even though the effective date for most provisions is January 1, 2018. As a result, we re-measured our net U.S. deferred tax assets at the 21% future tax rate.			Audit periods remain open for review until the statute of limitations has passed, which in the PRC is usually 5 years as the Company's most significant tax jurisdiction.
Net unrecognized tax benefits		$ 0		$ 0
Percentage of corporate tax rate				21.00%
Hong Kong Income Tax [Member]
Taxes (Textual)
Estimated net operating loss carry forwards for U.S. income tax purposes		2,125,465		$ 2,125,465		1,960,933
China Income Tax [Member]
Taxes (Textual)
Estimated net operating loss carry forwards for U.S. income tax purposes		4,268,778		4,268,778		2,678,523
Us Income Tax [Member]
Taxes (Textual)
Estimated net operating loss carry forwards for U.S. income tax purposes		$ 816,908		$ 816,908		$ 816,908
Expiration date				Mar. 31, 2032