Born in Pyongyang in 1949, Yun and his brother were raised by his mother after his father defected to South Korea in 1950 during the Korean War.
[1] Yun served as interim manager of the North Korea national football team between 1992 and 1993.
In January 1992, Yun found that his cousin had been living in Hawaii, and asked her to bring his father to China.
In July of the same year, on his return from the 1992 AFC U-16 Championship in Saudi Arabia, Yun met with his father in a restaurant in Beijing.
[1] Following his defection to South Korea, Yun worked as a member of the K League, before running a restaurant in Daegu.