CIX (Korean: 씨아이엑스, romanized: Ssi-a-i-ekseu, pronounced as C-I-X) is a five-member South Korean boy band formed by C9 Entertainment in 2019, consisting of BX, Seunghun, Bae Jin-young, Yonghee and Hyunsuk. The group debuted on July 23, 2019, with their first EP titled Hello Chapter 1: Hello, Strange