Income Taxes (Details)	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Statutory rates in Cayman Islands and BVI	0.00%	0.00%	0.00%
Statutory rates in Hong Kong	16.50%	16.50%	15.00%
Statutory rates in PRC	25.00%	25.00%	25.00%
Temporary tax holiday in the PRC	(25.00%)	(25.00%)	0.00%
Foreign earned income not subject to taxes in the Cayman Island	(16.50%)	(16.50%)	(40.00%)
Additional accruals in the PRC	0.00%	0.00%	83.50%
Effect of valuation allowance	0.00%	0.00%	0.00%
Effective income tax rate	0.00%	0.00%	83.50%

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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Effective income tax rate reconciliation temporary tax rate during the period.

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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