On the day of Mnet 'M Countdown', IZ*One, JBJ95, April, Golden Child, Stray Kids, Kim Dong-han, Weki Meki and Promis Nine attended.
About Weki Meki
Weki Meki is a South Korean girl group formed by Fantagio in 2017. The group consists of eight members: Suyeon, Elly, Yoojung, Doyeon, Sei, Lua, Rina, and Lucy.
 Wikipedia