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On April 9, 2016. He attended the 16th Annual Music Awards with NCT U, where he performed a solo dance performance and participated in "일곱 번째 감각 (The 7th Sense)" with the other NCT U members. On the 10th, he appeared in the music video for "WITHOUT YOU".

On May 9 of the same year, he appeared in the NCT group variety show "NCT Life in Seoul" as a trainee. NCT 127 For specific activities by NCT 127, please visit the main article. On July 3, 2016, he was publicly announced to be a member of NCT 127, On the 7th, the group released the title song "소방차 (Fire Truck)" on the first mini album NCT #127, and appeared on Mnet's M Countdown.

On November 23, 2018, it was officially announced that he did not participate in the new album activity of NCT 127 for the repackaged album Regulate because he was preparing for his Chinese debut. NCT For specific activities by NCT, please visit the main article. He debuted in NCT U with the song "BOSS", released on February 18, 2018 as a prelude to NCT 2018 EMPATHY. For the NCT 2020 project, he participated in the promotions for NCT 2020 RESONANCE Pt. 2 title song "90's Love".

WayV For specific activities by WayV, please visit the main article. The formation of WayV was announced through the group's official Weibo account on December 31, 2018. Though the group's existence had been alluded to during the NCT 2018 promotions. He debuted with WayV as the group's lead dancer, lead rapper, and sub vocalist on January 17, 2019, with the digital release The Vision.

For WayV's Rainbow V project, he choreographed and performed a dance with Ten. The music they used was Billie Eilish and Khalid's "Lovely".

On September 30, 2021, WinWin established a personal studio for his acting career in China. He is set to appear in the Chinese drama "网剧如月 (The Shadow)".

From March 30 to June 15, 2018. WinWin was a regular cast member in Hunan Satellite TV's 我们的师父 (My Brilliant Masters).