hyson       
noun [ U ] uk/ˈhaɪ.sən/ us/ˈhaɪ.sən/ (also hyson tea)
 熙春绿茶
a kind of green tea from China
  When you add hot water to hyson, the dried leaves start to unfurl. 
Hyson tea comes from Anhui province in eastern China. 熙春茶产自中国东部的安徽省。 
 - More examples
 - I will always choose hyson because of its smooth, mellow flavour.
 - Young hyson tea, made with leaves picked early, is particularly good.
 - The recommended method of preparing hyson tea is to put one teaspoon of leaves in a cup, add hot but not boiling water, and allow it to steep for at least two minutes.
 - Hyson tea became popular in western countries in the 18th and 19th centuries.