Unjong tea contains coffeine, tannine, essential amino acid and vitamin C and E. It is good for urination, detoxification and prevention of cancer and aging, while helping ensure normal heart movements.

Cultivated in Kangryong County, South Hwanghae Province, this tea is called Kangryong green tea or Kangryong black tea.

President Kim Il Sung in his lifetime suggested cultivating tea plant in Korea and gave an instruction on trying it in the said county.

Considering the instruction to be his behest, leader Kim Jong Il paid deep attention to cultivating the plant. As the plant was cultivated with success, he named it Unjong (benevolence) tea in order to hand down through generations the President's love for the people and saw to it that a tea cultivation farm was built in Kangryong County.