Southern Korean singer most widely known as an associate from the multi-Platinum guy music group Shinhwa. He released five albums being a single musician before rejoining the music group in 2012 for some return concerts and a fresh album, The Come back. He auditioned for Brothers Entertainment in the U.S., and he became the initial official person in Shinhwa. He ruptured his cruciate ligament throughout a live show of “Yo!” in March 2012, needing surgery and half a year of treatment. His delivery name can be Jung Pil-kyo. He continues to be bandmates with Lee Min-woo in Shinhwa.