They should do as a the Azerbaijans did. Using old planes as drones to bait air defenses.
A squadron of F-7s loaded with bombs and ESM sensors flying high and fast towards Taipei would cause air defense operators to shot, not only revealing their position, but spending precious AA missiles to stop the threat.
A supersonic kamikaze drone is terrifying, but entire squadrons of them are nightmare fuel.
I wrote “wartime decoy aka unmanned J-6”.