> However, of course both states were the result of a split of "Germany".
> This is the same with the ROC and PRC
It really isn't.
Note that West Germany did not have to invade East Germany to re-unify and that East Germany was on a per-capita basis much poorer than West Germany.
Unlike Taiwan, which is doing more than twice as good. So this would be more in line with Russia invading Ukraine. And that's precisely the rhetoric they are using: 'unification'.
This is all totally inacurrate and beside the point.
China has factually split, like Germany before. Whether any "reunification" happens peacefully or not is irrelevant to the use of term and so is which side is the richer.
Russia and Ukraine is obviously not the same at all, and "unification" is obviously not the same as "reunification".