Billed as a girl group survival show, Girls Planet 999 began airing on South
Korean television during the summer of 2021, with 99 contestants competing for a
chance to join a nine-member singing group upon the show's completion.
Contestants hailed from Japan, China, and South Korea, representing a blend of
J-pop, Cantopop, and K-pop influences. Although most were relative newcomers,
several performers had previously released music on a national or international
level. Choi Yu-jin had recorded multiple Top 40 records as a member of the K-pop
girl group CLC, Xu Ziyin had pursued a ...