The China farmlands, the few that they have, were flooded with rains this spring and summer. They have no choice but to buy corn, grain and soy from the U.S.A.. No other country on earth, but the blessed U.S.A., can provide what they need to feed their people.
Despite the vast size of the country, there is little verdant farmland compared to it's massive population.
Without us, they would go hungry, and ZiZiPing knows that.