Shang Xinyi participated in the SMTOWN trainee audition held in Beijing alone. She entered SMTOWN with the first place in the competition area. She met the idols SNSD, EXO, fx, and sJ. Because of her lively and cheerful personality, she got along well with the members of several major groups. Also because she has good vocal and dance skills, she became a member of [ACE Girl's] in a short period of time. She fell in love with Lu Han while working with EXO on the same stage many times, and a series of other stories