In 2011, she won silver at the World Championships,[2] then in 2015, she became the world champion in middleweight.

[3] She represented South Korea at the 2016 Summer Olympics in Rio de Janeiro, in the women's 67 kg where she won her first Olympic gold medal.

[1][3] She became the third Korean to win an Olympic gold medal in the 67 kg division (Lee Sun-Hee in 2000 and Hwang Kyung-Seon in 2008 and 2012).

She returned at the 2024 Summer Olympics in Paris as the head coach for Korean men's competitor Seo Geon-woo at the Men's 80 kg division.

This biographical article related to South Korean taekwondo is a stub.