Lee Kyu-hyong gained his first international experience at the Junior Asian Championships 2016 in Ho Chi Minh City , where he finished seventh in the 200-meter run in 21.90 s and over 100 meters with 10.91 s Eliminated in the semi-finals. He qualified for the U20 World Championships in Bydgoszcz , where he was eliminated over both distances in 10.84 s and 21.84 s in the first round. In 2019 he took part in the South Korean 4 x 100 meter relay at the Summer Universiade in Naples , where he won the bronze medal behind the teams from Japan and China in 39.31 s.
In 2020 Lee became the South Korean champion in the 100-meter run.
Personal bests
100 meters: 10.37 s (+1.0 m / s), September 1, 2019 in Fujiyoshida
200 meters: 21.33 s (−1.0 m / s), April 25, 2019 in Yecheon
Note: This article places the family name before the person's first name. This is the usual order in Korean. Lee is the family name here, Kyu-hyong is the first name.