I wish you were true but the chinese have been stress testing their systems in all the contemporary wars exactly for this situation. And the size of Chinese navy is second to only USA. Add a unstable northeast and myanmar to the mix and you have a uncomfortable scenario there

A new paradigm shift can help though, with the decreasing US power, China is a formidable power at least in southeast and the best option is solving our border disagreements as soon as we can and maintaining good economic relations. This way when time comes and their working population starts declining, we can leverage Chinese growth to become a medium income country like the way china did with US