Yi, Kyong Suk (aka Sumi) where are you????

I am looking for family of Yi Kyong Suk (she went by Sumi) and was married to Air Force serviceman Andrews. Together they had a daughter (b. 1987) and a son (b. 1989). Sumi's father's name is Yi Chon Yong and her mother's maiden name is Chong, Chong Sun. Permanent Address ....Cholla-Pukdo, Korea.