The chinese military is way, way behind in pretty much all regards and even going for "disruptive tech" won't do them much good when they can't even manage to design/produce a working jet engine for their fighter jets that isn't complete garbage. They basically resorted to copying 1980s russian designed engines, but couldn't get the metallurgy right so they just imported them. You can't start to compare with the US military capability if even Russia can be much better than you at producing something as basic (in terms of military needs) as a jet engine