Singer and Actor Choi Siwon attended a jewelery brand launch commemorative party held at the Seongsu-dong EsfActory in Seoul City, Seoul, on the afternoon of the 19th.
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