You lost the plot of the original comment. The original point was that somehow China would stop trading with any country that didn't agree Taiwan was Chinese by

You lost the plot of the original comment. The original point was that somehow China would stop trading with any country that didn't agree Taiwan was Chinese by their own volition. This never happened is in no way analogous to to Japan or Germany being blockaded. And no, the leaked documents don't just claim that Taiwan is an inseparable part of China, that's the public position. The leaked documents detail how control over Taiwan is necessary to be able to project sufficient naval power to break any attempted blockade especially by submarine due to the low depth of waters within the first island chain.