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