I don't think China wants a war, for many reasons including that it would be hard to govern a population that hates them so much. However, the West (their primary support) is already declining and will continue to decline in the future, especially with climate change. Global capitalism is headed for collapse, but China will remain relatively stable. I think Taiwan will eventually come to see the PRC as a life raft that can rescue them from the global economic and ecological breakdown, and throw in the towel out of desperation. Decades from now, of course.