Each 'swan' was to perform their favorite song as the idol singer chose Sunmi's "Gashina". While showing Cheng Xiao in the practice room, her fellow members commented, "Entice them with your Black Swan appeal", "It fits well with Cheng Xiao's image."
She followed it up as Cheng Xiao illustrated her graceful gestures matching to the beat of Sunmi's hit track.
Cheng Xiao added, "I felt like I could've done slightly better. I wanted to bring about a more ballerina-like pose, however, I will do better next time."