South Korean fighter who went undefeated during his career, and was an IBF Super Bantamweight Champion from 1985-86.
He won the Flyweight gold medal at the Asian Junior Amateur Boxing Championships in 1978.
He retired in December 1986 and became an actor and singer.
His sister, Ji-Sook, is an award-winning actress.
He and Chang Jung-koo are two of South Korea's most revered fighters.