Making liberalism a precondition for Chinese control over those territories seems odd. Presumably, a region either makes sense to have in a country or doesn't. This weird idea that countries deserve or don't deserve more land based on whether the west likes them and whether they hold one's own political values is some really weird redditor pseudogeopolitics.
If geography, demography, national desires, and the political climate of a TL make it make sense for an area to belong to a country, then there is no reason that should be predicated on a country's political alignment unless that alignment is the only reason it has a territory in the first place.
I am now going to go on a rant that pertains to broader trends in AH moreso than specifically just your post.
While this map challenge as a whole is fun (and is actually sensible to some degree because Tibet actually does have a distinct history, ethnicity, and desire for independence), I do have to say, this fehlingeresque obsession with balkanizing countries the West doesn't like is honestly getting really stale.
Apart from the fact that seeing a billion "every village in China and Russia is independent because muh democracy and somehow people whose families have identified with a given country for centuries are ok with this because the west won and everything is peaceful now" maps and not a single "Russia/China/Iran/whoever become democratic or withdraw from global geopolitics a bit but aren't randomly gigabalkanized", it's also just super unrealistic. Shit some of these ATLs verge on whatever the term for unnecessary death is, gore porn or something, but are accepted because it's what, pro-democracy gore porn or something?
Shit, one thing I don't see enough of which would realistically be the case is that an autocratic anti-western country becomes democratic but REMAINS opposed to the West. This would for example be the most likely case in Russia if they ever went democratic and would be the case in, say, Serbia in a perfectly and genuinely democratic system, as the populace isn't into being repressed by a shitty government (of course) but still generally doesn't like the West. Not saying everyone should do TLs like that, that would be boring too, just that more variety and more thought being put into AH would always be appreciated rather than having every "anti-western autocracy X ceases to be an authoritarian hellstate" TL just wind up being some American power fantasy about destroying your enemies.
