He is the 2007 and 2009 World Champion for 500 m. At the 2006 Winter Olympics, he won a bronze medal in the 500 m. He is the second South Korean person to win a medal in an event outside of short track speedskating, and he has become a representative to show that South Korea is expanding towards cultivating their athletes to excel in sports other than short track speed skating.

The record has been broken since then by Jeremy Wotherspoon on 9 November 2007, with a time of 34.03 seconds.

At the 2009 Winter Universiade in Harbin, China, Lee won the 500 m, beating Yu Fengtong with times of 35.00 and 34.82.

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