Ah ok thanks, don't know much lore hence the question. Looks like a perfect place for more factions in a DLC...
Quick googling about it, it seems it's "scrapped" content from Games Workshops side. Snake men sounds interesting.
Warhammer 3 did help to push GW to flesh out the lore and expand on Cathay.
https://www.trustedreviews.com/news/...mmer-3-4197098
So maybe these areas will still be used in the future. Seems like a waste of space otherwise ^^
EDIT:
well nevermind... shutdown quick.
https://www.pcgamesn.com/total-war-w...nippon-khuresh