I have known each other since I was a child, and I was a playmate when I was a child. Li Donghe, whose stage name is Li Kaican, was born in Seoul Special City on June 6th, 2000. Is a Korean pop male singer, member of NCT, Lee Mark,1born in Canada on August 2, 999, a Korean male singer from Canada, member of NCT. The results show that, as playmates since childhood, they have a very good relationship, and they joined the male singing group NCT together when they grew up.