[bilbo0s]

China imports food from the US.

China does not have to import food from the US.

In all honesty, China and the US are unique nations in that they don't have to import anything from anyone. It's politically and financially convenient for them to import the things they import, so they do. But they are both perfectly capable of meeting their own needs with domestic production if the issue is pressed. Even where they don't currently manufacture a thing, they're both able to ramp up manufacturing of that thing in a timeframe unthinkable for other nations.