Howdy!
So uh like in the last post there are a couple of Pandaren RP guilds on Horde. The Steelpaw Shaodin, The Kui Zhang society, and The Pandaren Empire.
I did find the link to the previous post as well that you were mentioning: Novice RP player LF Pandaren Themed guild - #7 by Kunbo-wyrmrest-accord
As a short plug for my guild we are a Huojin aligned guild that seeks to act on the interests of Huojin/refuges aligned with the Huojin/The New Horde. Our forum post is here: https://us.forums.blizzard.com/en/wow/t/h-rp-the-kui-zhang-society-huojin-pandaren-rp-guild-updated-41320/415123
I hope this helps!
Edit: Forgot to capitalize The Pandaren Empire