2016–2018: SM Rookies Influenced by the girl groups at the time and other artists such as
Lu Han and
Victoria Song, Xu auditioned for
SM Entertainment in 2014 and was revealed as the newest member of the trainee group
SM Rookies, alongside
Aespa's Ningning on September 19, 2016. During her time as a trainee, Xu appeared on the ''Rookies Princess: Who's the Best?
segment of the program My SMT'' that year. On October 1, 2018, Xu confirmed she had left SM Entertainment and returned to China, later signing under former
Exo member
Huang Zitao's label L.Tao Entertainment. Xu then joined the idol competition show
The Next Top Bang on October 16.
2019–present: Legal High and solo activities Xu debuted in January, 2019, as a member of the project group Legal High (Chinese: 嗨战队; pinyin:
Hāi Zhànduì), formed from the final survivors of the girls' team on
The Next Top Bang. The group were active for a year, releasing two singles: their debut single "嗨 (Hi)" on January 3, and "心星 (Heart Star)" on February 18. On May 2, 2020, Xu participated in the Chinese
girl group reality competition show
Produce Camp 2020 where she was eliminated in the final episode on July 4, finishing in eighth place. ==Personal life==