 He won the silver medal in the men's artistic individual all-around at the 2004 Athens Olympics, and his loss to American Paul Hamm by a 0.012 margin was closest in men's gymnastics Olympic All Around history, though tied by Gutsu's 1992 women's All Around win over Miller of 0.012.At the 2006 Asian Games, Kim tied Yang Wei from China for the gold medal on parallel bars and was part of the South Korean team that won the bronze medal in the team event.Kim tied Mitja Petkovšek from Slovenia for the gold medal on the parallel bars at the 2007 World Artistic Gymnastics Championships.