In 2013, he was cast into SM Entertainment, through SM Weekly Audition.
On July 17, 2014, he was introduced as a member of the pre-debut trainee team SMROOKIES. In August 2014, he appeared on Exo 90:2014, a reality TV Show starring EXO, alongside other members of the SMROOKIES program, where they performed songs from the 1990s.
In 2015, he appeared on Disney Channel Korea's The Mickey Mouse Club as a Mouseketeer alongside other members of the SMROOKIES program. The show aired from July 23 to December 17, 2015, and was hosted by Leeteuk of SUPER JUNIOR.
2016–present: NCT, solo endeavours
On July 7, 2016, he officially debuted as a member of the 2nd unit, NCT 127, with their mini album NCT #127.
On August 25, 2016, he debuted as a member of the 3rd unit NCT Dream, with the single "Chewing Gum".
On March 14, 2018, NCT released their first full album as part of a large-scale project uniting all of its subgroups: NCT 2018 Empathy.
The Mickey Mouse Club (Disney Channel Korea, 2015)
His fans donated over $2,500 in approximately 3 hours to be able to have a pudu at the Los Angeles Zoo named after him.
He loves classic Disney movies with The Lion King being his favourite.