No idea, but I think it's funny because of his eyes. I'm fairly certain that the joke is that he looks like he is about to do something bad (murder, rape, etc.), but the captions below always make him innocent somehow. It's similar to the Bear Grylls "Better drink my own piss" meme.
Yea I came last year. I was quarantined for about 30 days. Fml. The first day of my quarantine was the eve of Chinese new year last year. Fml again... Lol.