Although you have said nothing that can be labeled “untrue”, I think it’s worth mentioning that China has shown (at least so far) very little propensity towards expansionism outside it’s own coastal areas (and of course it is interested in Taiwan).
Also, it is worth mentioning that the difference between communism inside China and communism inside North Korea is the difference between night and day (though yes, they are both evil).
In the old days, the Soviet Union was definitely expansionist, supporting communist expansion all over the globe.
I don’t see China doing that, though it is, of course, promoting its own economic interests where possible, as in Africa.
Also, of course China is evil in Tibet.
But compare all of that to the expansionism of Islam, and it is Islam that I worry about right now, not China.
Historical note: China stopped the advance of Islam in a great battle in the 10th century, stopped it dead in its tracks as it expanded east.
Viet Nam and the Philippines would probably view them a little differently. Likewise Japan and South Korea. An SSBN is not a tool for waging a local, coastal war. I think your view of China is dangerously optimistic. Yes, Mohammedanism is a global threat. Communism (in its myriad guises) is no less of a global threat.