A girl cosplayed Keroro from <i>Sgt. Frog</i>. You can see the activity of cosplay on her background.
<a href="https://en.wikipedia.org/wiki/zh:User:%E6%9B%B8%E5%8C%85" class="extiw" title="w:zh:User:書包">書包</a>
<span class="int-own-work" lang="en">Own work</span>