Sin Hye Seong is the main vocalist of Sinhwa, a South Korean boyband. He also debuted as a solo artist in 2005 and since then released numerous albums. Hye Seong is the only member of Sinhwa who didn't have to absolve his mandatory military service due to several injuries in his career. He finally made a comeback with Shinhwa in March 2012. In addition, Hye Seong is a shareholder of 'Sinhwa Company'.