Subedei
Banned Idiot
If you believe that an air launched CJ-10A is good for a 2000km range then Guam is already well within range (Guangzhou to Guam is only about 3500km) since I don't expect they'll be flying overhead and dropping iron bombs as I'd think any H-6 pilot would prefer not to be anywhere near Andersen AFB if they can help it!
I certainly wouldn't expect h-6Ks to conduct conventional bombing runs over Guam, especially as their bomb-bays have been converted to fuel tanks. Nevertheless, I do believe that, PLAAF would have to risk assets of their H-6F conventional bomber fleet in order to inflict persistent damage to Andersen AFB's airfields sufficient to neutralize the capacity to launch strategic bombers. H-6F's would require airborne re-fueling to accomplish this objective. Of course, this phase would be subsequent to, and consequent of, PLAAF gaining freedom to operate in the airspace, a tall-task, indeed.