Based on <a rel="nofollow" class="external autonumber" href="https://www.crwflags.com/fotw/flags/de~hfl2.html#luli">[1]</a>
<a href="//commons.wikimedia.org/wiki/User:%E7%97%9B" title="User:痛">燃灯</a>
2022-05-06
<span class="int-own-work" lang="en">Own work</span>