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Taxes (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Taxes (Textual) |  |  |
Corporate income tax rate | 25.00% | 25.00% | 25.00%
Preferential tax rates , per share |  |  | $ 0.06
Favorable tax rate | 10.00% |  |
Deferred tax assets valuation allowance | $ 525,183 | $ 213,028 |
Subsidiaries [Member] |  |  |
Taxes (Textual) |  |  |
Corporate income tax rate | 10.00% |  |
Favorable tax rate | 15.00% |  |
Hong Kong [Member] |  |  |
Taxes (Textual) |  |  |
Corporate income tax rate | 8.25% |  |
Assessable profits | $ 2,000,000 |  |
Assessable profits, percent | 16.50% |  |
PRC [Member] |  |  |
Taxes (Textual) |  |  |
Corporate income tax rate | 15.00% |  |
Related Party [Member] |  |  |
Taxes (Textual) |  |  |
Corporate income tax rate | 10.00% |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition 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 other tax credits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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