Pencil sketch.
<a href="//commons.wikimedia.org/w/index.php?title=User:%E7%BD%97%E4%B8%80%E4%B8%81&amp;action=edit&amp;redlink=1" class="new" title="User:罗一丁 (page does not exist)">罗一丁</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>