SM Entertainment’s two top stars Super Junior’s Siwon and TVXQ’s Changmin appeared on duty for Korean National Police University’s annual appointment ceremony Friday.

The talented pair are currently serving their mandatory national duty as conscripted policemen. Siwon and Changmin were reported to have given a special preceremony performance and words of encouragement for the attendees. Both celebrities entered military service last November.By Jung Min-kyung ()