Pada akhir tahun 2020, ia tergabung dalam unit proyekNCT 2020 dengan single final album penuh keuda yaitu Resonance.
Tak hanya itu, dirinya jugaberpartisipasi pada konser online 'Beyond LIVE - NCT : RESONANCE 'Global Wave' yang disiarkan Naver V LIVE Beyond LIVE pada 27 Desember 2020.
Dikenal sebagai sosok yang multitalenta, ternyata Sungchan juga membintangi sejumlah acara TV.
Adapun beberapa acara yang pernah melibatkannya adalah sebagai berikut:
- Inkigayo (1991)
- Music Bank (1998)
- N' Minute (2017)
- 37.5MHz HAECHAN Radio (2020)
- [Un Cut] Production Story (2020)
- Master MOON Chef (2020)
- Welcome to Sun&Moon (2020)
- NCT WORLD 2.0 (2020)
- NCT WORLD 2.0 Behind Cam (2020)
- It's Awkward But It's Ok: Special (2020)
- 2020 ENQUETE 20 (2020)
- Life Corp. 2 (2020)
- Comeback Journal, N.C.T Episode (2020)
- Chen Le & Ji Sung's This and That Season 2: Behind the Scenes (2020)
- Star Road: NCT (2020)
- NCT 24hr RELAY CAM (2021)
- A Rooftop Farm (2021)
- Finding a Person by Kim Jung Woo (2021)
- Welcome to NCT’s Horror Nights (2021)
- NCT Halloween Manito (2021)
- EuMARKJUNGsim (2021)
- NCT Beautiful Moments of 2021 and Beyond (2022)
- The NCT Show in the NCT Universe (2022)
- 2022 Idol Star Athletics Championships Chuseok Special (2022)
- Star Road: NCT (2020)
- NCT 24hr RELAY CAM (2021)
- A Rooftop Farm (2021)
- Finding a Person by Kim Jung Woo (2021)
- Welcome to NCT’s Horror Nights (2021)
- NCT Halloween Manito (2021)
- EuMARKJUNGsim (2021)
- NCT Beautiful Moments of 2021 and Beyond (2022)
- The NCT Show in the NCT Universe (2022)
- 2022 Idol Star Athletics Championships Chuseok Special (2022)
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