About NCT 127
NCT 127 is a South Korean boy group formed by SM Entertainment in July 2016, the first fixed and second overall sub-unit from the main group NCT. The group consists of nine active members: Taeyong, Taeil, Johnny, Yuta, Doyoung, Jaehyun, Jungwoo, Mark and Haechan. The group made their stage debut on July 7, 2016 on M! Countdown, performing "소방차 (Fire Truck)" and "Once Again (여름 방학)". Their debut extended play titled NCT #127 was released digitally on July 10 and physically on July 11.