Exo-CBX

Exo-CBX is the first sub-unit of South Korean–Chinese boy band Exo, consisting of Chen, Baekhyun, and Xiumin. Formed by SM Entertainment, the group debuted with their first EP Hey Mama! on October 31, 2016. History 2016: Formation, debut with Hey Mama! On July 29, 2016, Chen, Baekhyun and Xiumin appeared in a video titled "Reservoir Idols" during Exo's concert tour Exo Planet 3 – The Exo'rdium. They then released an original soundtrack titled "For You" for the SBS television drama series Moon Lovers: Scarlet Heart Ryeo on August 23, 2016. As a result, it was speculated that they would form Exo's first sub-unit. This was confirmed by SM Entertainment on October 5. On October 23, they performed "For You" for the first time as a unit at the 2016 Busan One Asia Festival. On October 24, the unit's name was announced to be Exo-CBX (shortened from ChenBaekXi), after the first letter of the members' stage names.