Good luck lmao. China has the most fertile land in the world for growing rice and wheat sustainably and this has been true since 10000 BC. Rice grows wild without human intervention even today in vast parts of southern China, you literally just pick it up from the ground. There's a reason civilization started in China independently.
Since US farmers like Trump so much, China should do a Trump on them. Trump says he wants to payout less per dollar owed to countries that bought US treasuries and bonds. He said he does that to entities he owes money to because if they want their money, since it's a lot, they'll have to take it or get nothing. He has lawyers that delay any court case where the party that he owes money eventually gives up and takes less than what he owes. That's what China should do to US farmers where China places an order then when its almost ready to ship, demand they charge less.
Nikki Haley says if she's President, she'll make China dependent on the US for food. How does she propose how to do that? It would have to involve violating human rights where either she'll have destroy the arable lands of other countries that would be competition to them or she would militarily invade China to takeover and force Chinese to buy only from the US. And remember this... she's only saying it because that's what US farmers want to hear.
Rice doesn't require tractors to harvest or plant and indeed they are difficult to use in muddy conditions. Humans and cows can handle all aspects of rice production.
Their agriculture is like the oil industry, uses mined fossil water from aquifers which can't be replaced. China has natural agricultural fertility that was so easy even literal cavemen could do it.