With regards the likelihood of invasion and starting a war, I see far more differences between Russia and China than I do similarities. China does have an authoritarian government and a strong military, and it does lay claim to an island 130 km off its coast.
By all means the West should take preparatory action in case of future wars and continuing diplomacy to reduce the possibility. But I think the idea that people should fear a war with China, or be convinced a war is likely, is not just a misrepresentation but in itself counterproductive to possible improved and strong economic and social exchange.
China does engage in border wars, but it has no long history of invasion, colonisation or large scale expansion outside the mainland, as we obviously do in the West. They have every right to arm themselves after what they endured in their century of shame. They are overly aggressive in the south china seas - from our perspective - but so are we (US/UK/Aus) when we think it’s necessary to protect our interests.
Having an authoritarian government doesn’t mean they are about to start a world war. If we depict China as an enemy which we may soon be at war with, this can only expand the idea in the minds of the Chinese that we are their enemy.