In 2014, he was cast into SM Entertainment through SM Weekly Audition. In April 2017, he was introduced as a member of SM's pre-debut training team, SMROOKIES, and in the same month, he appeared in Yesung - "Paper Umbrella" music video, alongside former SMROOKIES Koeun.
2018–present: Debut with NCT
In January 2018, Him alongside Kun, and Lucas were announced to become NCT member, through the NCT 2018 Yearbook.
On February 18, 2018, he officially debuted as a member of NCT, in the unit NCT U, with the song "Boss". On March 14, 2018, he took in the NCT's first studio album NCT 2018 Empathy.