Lee Dong Hyuk, better known by his stage name Haechan, is the lead vocalist, lead dancer of the SM Entertainment KPOP boy groups NCT 127 and NCT DREAM. He was born in Seoul but moved to Jeju when he was 7 through to the age of 12. Haechan joined SM through the Weekly Audition and his stage name was picked by Lee Soo Man, the CEO of SM entertainment. He was announced as a NCT U member for the STATION X special release, on December 2, 2019.