Jinhong is a former member of Korean Boygroup 24K (투포케이). He is also the former maknae of AA.
After Juwon left Wellmade StarM's boy group AA in 2013, Jinhong, then 15 years old, joined. In 2015, he quit the group to work for Choeun Entertainment's 24K. During the group's "Hey You" return performance, Jinhong and Hui disguised their identities using masks. It was formally announced by the end of May 2015 that Jinhong had joined the group.
Jinhong and the other 24K members tried out for YG Entertainment's survival series MIXNINE in 2017.
Jinhong withdrew from the entertainment business in 2019 after departing from 24K. He did make an appearance in the "Cheese Burger" music video by his old groupmate Kisu in 2022.