I think you are thinking too much into it. They want to be able to export US pork to China because there is demand in China for this premium product. Increasingly Chinese businesses are putting more focus on their domestic market since there is an emerging middle class there and people can actually afford a lot of new things now.
Are there businesses in China that want to export chicken to the US? Sure. But thinking that is the primary reason for this deal is pretty far fetched.
Actually the US pork is not "premium" product in China but considered safer than the stuff they raise in China. US pork is leaner than the Chinese prefer. We in the US want our pork as lean as possible for health reasons and taste be dammed.
But the "primary" reason is not to ship pork to China. They could do that without buying the company. They want to control the shipments. That can't be good for the US consumer.
And, surprisingly, China has become a major exporter of food. We think of China as a country of starvation and hunger still. But they do massive food production. Turns out chicken production is one of their big things. In fact they produce so much they are now an exporter. And they have tons of land with no environmental restrictions and cheap labor and lax regulation which they are trying to turn into becoming a major chicken exporter. Just like with solar panels, the government has set their sites on this. And the US is a prime target. But they can't get in because of their history and the power of the US "chicken" lobby.
Smart move. Get the "pork" lobby on your side. And at some point China will complain the US won't take their chicken while at the same time dumping pork on the US market to lower prices. Then the pork lobby will turn against the chicken producers.
In ten years chicken will be 25 percent Chinese and eventually about 30-40 percent Chinese.
And at some point China will do the same with pork production which is even more suited to their no regulation on pollution policies.