So Jung Hwan is a member of YG Entertainment’s boy group, TREASURE. So was a child model and appeared in many commercials. Later, he learned Taekwondo and acrobatics and even joined the popular Taekwondo performance group, K-Tigers. In November 2018, he joined the survival show, YG Treasure Box, as one of the youngest contestants and was selected third in the debut line-up.
So made his debut at the age of 15, on August 7, 2020, with the track "BOY" from their debut single album ‘THE FIRST STEP : CHAPTER ONE’. Together with the members of TREASURE, he went on to win Rookie of the Year awards and performed at several events such as the Asia Artist Awards (AAA), Golden Disc Award (GDA) and Mnet Asian Music Awards (MAMA).
He made his acting debut in the webdrama "It’s okay, that’s friendship".