China is incontrovertibly ramping up for war. Look at what has happened in the past month alone. Deal with India to use a port, the Israeli port, the China/Russia war games, China forces their entire population to practice bombing response/protection, and Chinese leader speech to the military about mentally preparing from peace time to war.
They are without a single doubt trying to isolate American allies, encircle the states and I have no doubt it will happen likely by 2020. They realize America is divided right now and they also realize the longer Trump is in office, the bigger chance that America regains military/global dominance.