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Inventories (Tables)
3 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
    June 30   March 31 
    2020   2020 
    (Unaudited)     
Rice and other products   13,480    41,153 
Packing and other materials   12,856    15,457 
Total inventories at cost   26,336    56,610