Xu Yi Yang is a trainee under L.TAO Entertainment. She is a pop music singer and a member of the girl group, Legal High. In September 2016, she was revealed to the public as a member of the pre-debut group, SM Rookies. In October 2018, she participated in the competition show "The Next Top Bang" and successfully won the opportunity to debut. On January 3, 2019, she released the single "Hi" with her group on the show. On the 20th, her group held a debut press conference, which officially marked their debut. In March, they won Best Newcomer at the 26th Chinese Top Ten Music Awards. In May, she was invited to attend the 2019 China Brand Day Gala.