 Music Core", his part was performed by bandmates Yesung, Eunhyuk and Shindong.He was selected to be an internet broadcast radio DJ in January 2012 on "Space for a Rest-Visible Radio", which was aired through Seongdong District's homepage every Friday, where he was serving his two-year mandatory military service.He was responsible for filming and editing video footage to advertise the Seongdong District Office, but because of his experience and previous exposure in the media industry, they thought it will be a better fit for him to be a DJ.