China actually has an air defense capability.
I’m not sure what a few B2s are supposed to do.
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Really? Well you could use your imagination, and come up with something, or you could just put it down to stupidity and be sure that they will do NOTHING. How’s that?
I sure as heck don’t have access to the Military Plans in that area, but I’ll bet we have some smart people that have a plan.
We have an Air Offense capability. You do not always have to fly a B-52 over a target to attack it. You can stand off and do it with cruise missiles. Here is a program begun in 1982. (So this is not restricted access information not already known by China.) If you have 5 B-52s launching 20 nuclear tipped cruise missiles and 50% hit their targets China has problems. (I am not an expert on B-52s.I have no idea about current capabilities.) Mind you, if it came to it you also have a submarine fleet with missiles that is probably a greater deterrent.
https://en.wikipedia.org/wiki/AGM-86_ALCM
“All variants of the AGM-86 missile are powered by a Williams F107 turbofan jet engine that propels it at sustained subsonic speeds and can be launched from aircraft at both high and low altitudes. The missile deploys its folded wings, tail surfaces and engine inlet after launch.”
“AGM-86B/C/D missiles increase flexibility in target selection. AGM-86B missiles can be air-launched in large numbers by the bomber force. B-52H bombers carry six AGM-86B or AGM-86C missiles on each of two externally mounted pylons and eight internally on a rotary launcher, giving the B-52H a maximum capacity of 20 missiles per aircraft.”
“An enemy force would have to counterattack each of the missiles, making defense against them costly and complicated. The enemy's defenses are further hampered by the missiles’ small size and low-altitude flight capability, which makes them difficult to detect on radar.[2]” (More at link)