Sergeant Jung Yunho to perform on the 21st December (7pm) at the Uijeongbu Arts Centre (의정부 예술의전당) for the 2016 Gyeonggi-do KR-US End-of-Year concert.
TVreport posted on this event (excerpt summary):
This coming 21st, U-Know Yunho would be participating in the 2016 Korean-United States End Of Year Concert meant to promote harmony between military personnel from both countries as well as the local residents. On the 20th, pictures on various online sites had a smiling Yunho on site rehearsing, attracting attention with his bright expression and exceptional proportions.
and some photos were shared via soldiers SNS:
OP said Yunho was really good-looking