Gu Jia Cheng, who also goes by Jason Koo, is a Chinese singer and actor. Born on June 19, 1992, he competed in the music competition X-FIRE in 2015 and was chosen as the main rapper for the boy group X-NINE. He made his acting debut in the 2016 television series “Super Star Academy” and has also appeared in “Oh! My Emperor” (2018) and “Fights Break Sphere” (2018).
