Exo-CBX is the first official sub-unit of South Korean-Chinese boy group Exo. Formed by SM Entertainment in 2016, the group is composed of three Exo members: Chen, Baekhyun, and Xiumin. Their debut extended play Hey Mama! was released on October 31, 2016.

Why was exo-CBX created?

Regarding why they formed the unit group, Baekhyun said, "We work out together, and the trainer said that the three of us have similar heights and would do well if we [did a group] together. That's why we actually suggested that to the company and ended up making this unit.

What does CBX stand for exo?

EXO-CBX (엑소-첸백시), an acronym for EXO-'ChenBaekXi', is a 3-member South Korean sub-unit of EXO under SM Entertainment. The group consists of Xiumin, Baekhyun, and Chen.