On the afternoon of the afternoon, 'M Countdown' live photo wall event was held at CJ ENM Center in Sangam-dong, Seoul Mapo-gu.
group die Jung Chae-yeon has photo time.
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