China is shooting itself in the foot by halting soybean imports. Soybean is not just an agricultural product anymore; it's one of the most important inputs for both agricultural and industrial usage. Especially if China is not importing animal meat products from USA anymore, it needs to grow its own livestock and it needs to import soybeans as soybean is the most important livestock feed. There is not one country that produces soybeans more efficiently than USA. If it stops importing soybeans from USA, it's either going to have to pay more and get less from other countries or grow it on its own soil, neither of them good alternative solutions.
I hope China is not this stupid or this is just a stupid rumor.