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Summary of Significant Accounting Policies (Details 4)
Mar. 31, 2018
Mar. 31, 2017
RMB:US$ [Member]    
Period/year end exchange rate 6.61843 6.89053
Period/annual average exchange rate 6.50682 6.729145
HKD:US$ [Member]    
Period/year end exchange rate 7.77047 7.77047
Period/annual average exchange rate 7.75883 7.75883