Comment by keybored

That covers the China side of things. Presumably America is doing nothing against China. In that case things would be very lopsided and you (in general) would have a reason to be concerned. On the other hand if America was doing “adversarial” things in the direction of China as well, and both sides at sufficiently low intensity, it could still be argued that the two countries are not playing a zero-sum game overall because trade etc. happens in spite of all that.