Summary of Significant Accounting Policies (Details 4)	6 Months Ended
	Sep. 30, 2020
Leasehold improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	3 years
Leasehold improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	10 years
Motor vehicles [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	3 years
Motor vehicles [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	5 years
Office equipment & furniture [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	3 years
Office equipment & furniture [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	5 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	35 years