Where do these game pieces belong?
The description on that image says &quot;Optional counters (see files)&quot;, and if you go to the Files section of the game on BGG there are a number of PDF files that call themselves &quot;Optional countersheet for Khan&quot; that look just like that image.
At a guess, they're designed to replace the counters that come with the game to either be more readable, or look nicer, or something.