BUR #39006 has been rejected.
remove implication ring_hair_extensions -> hair_extensions
create alias ring_hair_extensions -> ring_hair_ornament
Ring hair extensions was created by an admin when I was trying to figure out how to tag Changli's hair extensions in front. Between then and now, Evelyn Chevalier and Tsukishiro Yanagi appeared on Danbooru and had similar rings in their hair - the only difference between theirs and Changli's is the size, count and not having extra hair hanging off the rings. From a discussion off the forums, ring hair ornament was the tag name we arrived at to tag Tsukishiro Yanagi with (and later Evelyn Chevalier).
These tags are now running into the exact same collision problem as floating hair ornament did with floating headgear (topic #29922) where two tags for virtually the same thing are in use by majorly only 1-2 characters. Ring hair extensions as it stands right now is by and far only used by Changli (125 posts out of ~1.7K are not her) and the other two aforementioned characters use ring hair ornament, though sometimes they also get ring hair extensions likely due to this confusion.
With the above in mind, I'm proposing to merge Changli's ring hair extensions into ring hair ornament since that is a more intuitive tag name and adaptive to both cases of having hair extensions attached to them or not. Hair extensions + twin braids + ring hair ornament alone can describe what's going on with Changli, no need to fragment the tagging for hyperspecificity.