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Taxes (Details) - Schedule of taxes reconciles rate
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Schedule Of Taxes Reconciles Rate Abstract      
PRC statutory income tax rate 25.00% 25.00% 25.00%
Effect of PRC preferential tax rate (10.00%) (10.00%) (10.00%)
Effect of other deductible expenses 2.70% 7.40% (3.30%)
Total 17.70% 22.40% 18.30%