1On May 2, 992, Sun-mi Lee was born in Chingtan County, Gyeongju, South Korea. Her father died when she was 13 years old. She lives in the country with her mother and brother and often can't go to Seoul to practice. Later, when her mother remarried, Xuanmei and her two younger brothers moved to her stepfather's household registration, and her surname was changed from the original only surname to her stepfather's surname Li.

In 2005, he participated in the draft of S.M.Entertainment, then transferred to JYP Entertainment as an intern, joined Wonder Girls's training program, and finally made his debut as a member.