In 2015, he was cast into SM Entertainment through SM’s Global Audition in Hong Kong. On April 5, 2017, he was introduced as a member of SM's pre-debut training team, SMROOKIES, and in the same month, he appeared in NCT member Ten’s "Dream In A Dream" music video.
2018–2019: Debut with NCT, & WayV
In January 2018, Him alongside Kun, and Jungwoo were announced to become NCT member, through the NCT 2018 Yearbook. On February 19, 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.
On December 31, 2018, it was revealed that he was a member of NCT's Chinese sub-unit, WayV which debuted on January 17, 2019, with the digital EP, The Vision.