Considering that a colossal amount of US pork is exported TO China (something like 15% of all pork exported), who is the world’s largest pork consumer and we’re the world’s largest pork exporter, I sort of suspect that they don’t do a lot of exporting of raw pork.
I don’t know the code, but pretty good rule of thumb is no uncooked farm products. Definitely no uncooked meat products into the US. Customs folks get mighty upset and can fine you big time for bringing in just personal use.
For really expensive raw meat products, maybe it makes sense to jump thru whatever hurdles the FDA has in place. If it’s cheap, it’s either US product or smuggled. There are plenty of producers in the US that make “traditional” Chinese foodstuffs that are not importable such as mooncakes with egg yolks or “Jinhua style” ham.