Cosmic Girls, also known as WJSN, is a South Korean-Chinese girl group formed by Starship Entertainment and Yuehua Entertainment which debuted in 2016. The group is composed of thirteen members: Seola, Xuan Yi, Bona, Exy, Soobin, Luda, Dawon, Eunseo, Cheng Xiao, Mei Qi, Yeoreum, Dayoung and Yeonjung. The members are separated into four subgroups for each letter in “WJSN”: Wonder, Joy, Sweet, and Natural. The group debuted with the release of their first extended play Would You Like? on February 25, 2016. The agency announced their fanclub name, Ujung (Hangul: 우정, Friendship) on January 11, 2017