Seoul=) = DIA Jung Chae-yeon attends a rehearsal for KBS2 'Music Bank' (Mu Bang) at KBS in Yeouido, Seoul, on the morning of the 12th. April 12, 2019.
About Jung Chae-yeon
Jung Chae-yeon, known mononymously as Chaeyeon, is a South Korean singer and actress signed under MBK Entertainment. She is best known for being a member of the South Korean girl group DIA, and for finishing 7th in the survival show Produce 101, making her a member of I.O.I.
 Wikipedia