 In the semifinals of the Sydney Games in 2000, he defeated Kang Yong-Gyun of North Korea 10-0.At the Opening Ceremony, the North and South Koreans had marched together.In this spirit, before the medal matches, Sim gave advice to Kang about the man he would be facing in the bronze-medal match-Andriy Kalashnikov of Ukraine, while Kang gave Sim a scouting report on his opponent in the gold-medal match-Lázaro Rivas of Cuba.