Yeonjung graduated from Hanlim Multi Art School, Seoul on February 9, 2018 and was a student in the Practical Music Department.
2016: Produce 101, I.O.I and WJSN
From January to April, she participated in Mnet's survival television show, Produce 101 as a trainee representing Starship Entertainment. She finished the survival in 11th place, becoming member of the girl group I.O.I. The group debuted on May 4, 2016 with Chrysalis. Later that year, she was added to the girl group WJSN and officially debuted with them on August 17, 2016 with the mini album The Secret.