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Capital & Equity (Details)
1 Months Ended 12 Months Ended
Sep. 15, 2017
USD ($)
$ / shares
shares
Aug. 31, 2017
USD ($)
Aug. 31, 2017
CNY (¥)
Jul. 25, 2017
Mar. 31, 2020
USD ($)
$ / shares
shares
Mar. 31, 2019
USD ($)
$ / shares
shares
Mar. 31, 2018
USD ($)
Mar. 31, 2016
USD ($)
Mar. 31, 2016
CNY (¥)
Capital & Equity (Textual)                  
Ordinary shares, par value | $ / shares         $ 0.0001 $ 0.0001      
Ordinary shares, authorized | shares         500,000,000 500,000,000      
Ordinary shares, issued | shares         11,421,393 11,421,393      
Proceeds for ordinary shares | $ $ 7,731,271       $ 7,731,271    
Outstanding ordinary shares, description       1-for-10 reverse stock split.          
IPO [Member]                  
Capital & Equity (Textual)                  
Proceeds for ordinary shares | $ $ 797,092                
Common Stock [Member]                  
Capital & Equity (Textual)                  
Ordinary shares, par value | $ / shares $ 6.00       $ 0.0001        
Ordinary shares, authorized | shares         500,000,000        
Ordinary shares, issued | shares 1,421,394       10,000,000        
Proceeds for ordinary shares | $ $ 8,528,363         $ 1,000      
Common Stock [Member] | Hangzhou Longyun [Member]                  
Capital & Equity (Textual)                  
Capital contributions | $   $ 145,232           $ 1,053,607  
Common Stock [Member] | Hangzhou Longyun [Member] | RMB [Member]                  
Capital & Equity (Textual)                  
Capital contributions | ¥     ¥ 945,000           ¥ 6,800,000