Micky Yoochun. Two years later Sungmin replaced  Kang-In  as one of the key  DJs  of  Reckless Radio  and is currently hosting it with Sooyoung of  Girls' Generation . CHOI SIWON Real Name:  Choi Siwon Stage Name:  Siwon (official) | Shiwon (unofficial) Chinese Name:  Shi Yuan Date of Birth:  February 10, 1987 |