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Income Taxes (Details 1) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Income (loss) before taxes |  |  |
Total income (loss) before taxes | $ 758,917 | $ 2,178,299 | $ 817,669
Provision for taxes (benefits): |  |  |
Provision for income taxes (benefits) | 633,614 | 464,327 | 164,817
Deferred tax assets: |  |  |
Less: Valuation allowance | (179,665) |  | (66,527)
Currency Effect |  |  | 407
Deferred tax assets, net |  |  |
Effective tax rate | 83.50% | 21.30% | 20.20%
Cayman Islands [Member] |  |  |
Income (loss) before taxes |  |  |
Total income (loss) before taxes | $ (1,550,037) | $ (119,790) | $ (39,223)
Provision for taxes (benefits): |  |  |
Provision for income taxes (benefits) |  |  |
Deferred tax assets: |  |  |
Deferred tax asset |  |  |
BVI [Member] |  |  |
Income (loss) before taxes |  |  |
Total income (loss) before taxes |  | (46,630) | (5,213)
Provision for taxes (benefits): |  |  |
Provision for income taxes (benefits) |  |  |
Deferred tax assets: |  |  |
Deferred tax asset |  |  |
Hong Kong [Member] |  |  |
Income (loss) before taxes |  |  |
Total income (loss) before taxes | 63,343 | (4,229) | (3,558)
Provision for taxes (benefits): |  |  |
Provision for income taxes (benefits) |  |  |
Deferred tax assets: |  |  |
Deferred tax asset |  |  |
PRC [Member] |  |  |
Income (loss) before taxes |  |  |
Total income (loss) before taxes | 2,245,611 | 2,348,948 | 865,663
Provision for taxes (benefits): |  |  |
Provision for income taxes (benefits) | 633,614 | 464,327 | 164,817
Deferred tax assets: |  |  |
Deferred tax asset | $ 179,665 |  | $ 66,934

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