As dragon boat festival is coming ,we will have a holiday from 28th May to 30th May ,and come back to office 31th May .The Dragon Boat Festival, also called the Duan Wu Festival, is celebrated on the fifth day of the fifth month according to the Chinese calendar. 
For thousands of years, the festival has been marked by eating zong zi (glutinous rice wrapped to form a pyramid using bamboo or reed leaves) and racing dragon boats.
If you want to contact us ,please give us E-mail:sales@free-valve.com .Thank you!