[2] Lee participated at the 2012 World University Championships in Gwangju, South Korea, won a gold medal in the mixed team and a bronze in the singles events.

[3] He was also part of the South Korean winning team at the 2014 Asian Games.

[4] In 2016, Lee represented his country competing at the Summer Olympics in Rio de Janeiro, Brazil.

[5] Men's singles Boys' singles The BWF World Tour, which was announced on 19 March 2017 and implemented in 2018,[6] is a series of elite badminton tournaments sanctioned by the Badminton World Federation (BWF).

It was a series of badminton tournaments sanctioned by the Badminton World Federation (BWF) and played between 2007 and 2017.