There's a lot of analysis out there on Chinese food security, the TLDR is grain production is ~95%, but a lot of it goes towards animal feed. It's around 1000lbs per capita. In terms of crude, China only produces ~4M barrels per day, imports 10M. But the entire US military consumes 300k barrels per day for much broader portfolio. Other resources, only ~30% domestic self sufficiency in iron ore for steel production, but that's still ~300Mt which is ~60x total USN displacement. More or less everything else it stockpiles or can produce enough domestically for military needs, because relative to Chinese production the military doesn't actually use that much resources. All this is to say China is not Japan, it can't be "starved" into impotency, a blockaded China can not only sustain current military, but expand it by multiple folds on her own.