[4] Cao Lu made her debut as a member of South Korean girl group Fiestar under LOEN Entertainment label on August 31, 2012, with their first single "Vista".

In February 2016, Cao Lu was cast in MBC's Real Men for the female soldier edition.

[5] In the same month, she was confirmed to cast in We Got Married along with comedian Jo Se-ho as a couple,[6][7] which she departed from in September 2016.

[9] On May 15, 2018, Fave Entertainment announced that Fiestar would be disbanded due to the expiration of the other members' contracts on April 30, 2018.

[12] In March 2021, EE-Media announced on Weibo that Cao Lu had joined its ranks.