Chen wrote a letter to his fans on October 16th: ŌĆ£Hello, this is Chen. Are you doing well despite the constantly changing weather? The days of hot weather have now passed and autumn has come by already. The reason I am writing this is because I wanted to tell you that I am enlisting in the military on October 26th. I will do my best to fulfill my military obligation with a healthy mind and body so that I can greet you after my service with a better, more improved side of myself. I hope that you will stay as beautiful and healthy as you are now!! I will always thank you and love you ŌÖĪŌĆØ On October 15th, Chen released his digital single ŌĆ£Hello.ŌĆØ Source (1)