[3] His talent received attention early from South Korea's senior professional clubs, and he joined Suwon Samsung Bluewings just before his graduation.

During his era, Suwon won 13 titles including two Asian Club Championships and two K Leagues.

[7] He was expected to play for the national team in the 2002 World Cup, hosted by his country.

However, he suffered a cruciate ligament injury in the 2001 season, and failed to recover his condition before the World Cup.

[10] However, he was convicted of corruption for improperly selecting an acquaintance's son for the team after the 2018 season.