Super Junior Choi Siwon, who attended a jewelry collection Party of a jewelry brand held at the Es Factory in Seongsu-dong, Seoul on the afternoon of the 19th, has photo time.
About Choi Siwon
Choi Si-won, known mononymously as Siwon, is a South Korean singer, songwriter, model, and actor known for his work as a member of South Korean boy group Super Junior.
 Wikipedia