It is obvious that China is now feeding Iran excellent intelligence. China's satellites seem to enable them to track all relevant US assets in basically real-time, I mean they told Iran to hit inconspicuous warehouses which probably housed CIA facilities and even food supply? shipments to US CSG, undefended military bases, oil infrastructure ... If someone feeds you intelligence this good, you can use an F-4 to bomb some airbase you know has neither Patriot air defence nor any fighter jet nearby with impunity.
I was bemoaning lack of material support from china when this kicked off, but the intelligence they deliver seems to be a literal "game changer". Similar to how NATO ISR capabilities gave russia a lot of headaches in ukraine.