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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%