It is composed of four members: Hyo-yeon Kim, Chan-sheob Ahn, Ji-eun Kim, and Shin-seong Kim. Hyo-yeon Kim is an all-round talented woman who not only excels in singing, dancing, and acting, but also serves as a hostess fluent in Chinese, Korean, and Japanese. Back in 2006, Hyo-yeon Kim became a fashion star of the new rock music style in South Korea with her first rock album "Dream It"...... Every Saturday night, the Asian Cup of Master and Apprentice will be broadcasted on Jiangsu Satellite TV, featuring the four representatives from South Korea.