Pop singer and primary dancer from the K-pop son group A.C.E. He’s been a member from the dance group referred to as Urban Boyz. He was a previous JYP trainee beneath the name BK. He performed together until 2015. He became the champion of JYP’s 11th audition in 2014. He was created Kim Byeongkwan in South Korea, but he’s better known by his stage name Jjson. He and Kang Yoochan had been both notable people from the Korean son music group A.C.E.