He won a gold medal at the FIS Freestyle Ski and Snowboarding World Championships 2023 in the halfpipe.

[1] In 2023, Lee won the gold medal in the halfpipe at the FIS Freestyle Ski and Snowboarding World Championships 2023 in Bakuriani, Georgia.

The 16-year-old was the first South Korean to win a gold medal in any skiing or snowboarding discipline and also the youngest male snowboard gold medalist in world championship history.

[2][3] At the 2024 Winter Youth Olympics in Gangwon Province, South Korea, Lee grabbed two gold medals in snowboard men's slopestyle and halfpipe.

[4][5] He became the first South Korean to win a gold medal in snowboarding at any Winter Olympic competition.