Exactly. But I believe China is worried more about Tibet than Taiwan.
Also it’s not just Russia and China. The Hungarians in Slovakia and Romania have expressed some agitation recently, which is why Slovakia and Romania are both opposed to Kosovo independence. Spain is also opposed, due to its large Basque minority. And Italy is also opposed, although I’m not sure why (probably don’t want to ruin traditionally good relation with Serbs).
Apart from recent immigrants, Italy has some Albanians too, but they are descended from Christian Albanians who fled there at the time of the Ottoman conquest of the Balkans...and I don't think they are very numerous.
[”Also its not just Russia and China.”....]
Agreed. In short, it’s a real can of worms.