China has a LONG and cherrished history of letting their own population starve. there was a long period of time under Mao that they themselves called "the Starving Time".The other thing is, if China stops purchasing all produce and foods, doesn't that hurt the Chinese people? Will they start going hungry? That surely won't help the political situation there.
But...i see all this as step two in a very long American policy.
Step 1: Nixon, worried that China would start a nuclear WWIII, talked china into competing on the financial front, not the military front. Nixon encouraged china to become more capitalist, and they took to capitalism like a duck to water!
Step 2: With all their financial success...China appears to be reverting to their fiendish world dominating military plans. So it is now Trump's turn to do a slight course correction...to show China how to actually "play nice" with the rest of the world as a co-superpower. There is risk....but there is probably even BIGGER risk if Trump does nothing.
SHORT TERM there may be setbacks, and pain. But this is just part of a Republican 100 year plan on the pacific rim. You could even argue that this PLAN started at the signing of the treaty ending the war with Japan in 1946...and instead of us raping Japan, we helped to rebuild it....but with more acceptable world interactions.