Ukraine is not a buffer state between two powers though.
Only Americans see it like that, after they regained independence from USSR.
Ukrainians are an east Slavic ethnic group native of Ukraine, separated from Russians, who descend from Finno-Ugric tribes.
Unlike 97% of Taiwanese people, who are Han Chinese like in mainland China.
Taiwan is more like Catalonia, where Catalans insist that they are different from Spaniards, but the conclusion is that Catalans including other Spaniards and even Portuguese are the same ethnic people
EDIT: immediate downvotes are probably from Russian zealots pretending that the World is indeed 100% Russian and should stay like that.