Lee made his official debut for the 1996 Summer Olympics in Atlanta, Georgia, where he became the nation's flag bearer in the opening ceremonies. He placed twentieth in the first ever men's trap shooting, with a score of 119 clay pigeons, tying his position with ten other shooters including United States' Bret Erickson and Kuwait's Fehaid Al Deehani. The following year, Lee reached his breakthrough season in shooting, when he captured four gold medals in both trap and double trap at the Southeast Asian Games in Jakarta, Indonesia. Lee also competed for the second time in the men's trap at the 2004 Summer Olympics in Athens, where he placed twenty-first out of thirty-five shooters in the preliminary rounds, striking a total of 115 clay pigeons.