[2] At the 2012 Asian Championships, Lee won a bronze medal on the floor exercise behind Kenzō Shirai and Kim Han-sol.

[3] He represented South Korea at the 2015 Summer Universiade and helped the team win the silver medal behind Japan.

[4] Then at the 2015 Asian Championships, he won a bronze medal with the South Korean team and on the horizontal bar.

[8] He represented South Korea at the 2018 Asian Games and helped the team win the bronze medal behind China and Japan.

[12] After the World Championships, he competed at the 2019 Swiss Cup Zürich alongside Yeo Seo-jeong, and they finished seventh.