Precisely the basis of my argument for 4500 km combat radius bomber. I acknowledge the practical and logistical logic of Blitzo’s suggested 6000 km radius and I agree. And, I’m very satisfied that Chinese planners are invested in the philosophy of placing greater emphasis on the capabilities of weapons delivery systems.
Regarding the 6000km radius/12,000 km range thing, there are other roles for that kind of range further down the road, outside of high intensity conflicts where the mission of H-20 will basically targeting high value assets with stand off missiles.
That kind of long range also gives the aircraft the ability to carry a large number of direct attack munitions for more conventional interdiction/strike missions against less well defended targets -- either in the latter phases of a high intensity conflict where the opfor's air defences have been degraded, or simply against less capable foes. The prospect of PLAAF ever having the requirement to conduct penetrating bombing strikes with direct attack weapons might seem a bit fanciful now, but going into the late 2020s I expect this will begin to emerge as a requirement as the PLAAF consolidates a greater ability to achieve air superiority and achieves a robust stealthy stand off strike capability.
Looking at targets 6000km outside of China's borders, (or 6000km minus however many km inland depending on where H-20 is based), there are quite a few theatres where the late 2020s and 2030s and beyond could see the PLAAF have a role to conduct large scale conventional bombing.
That kind of dovetails with the other reason for why I think having a long, intercontinental range is important -- H-20 will likely be the mainstay of the PLAAF's bombing fleet for the middle part of the 21st century. We do not know what kind of global missions and requirements the PRC may have going forwards, but it may well require the ability to reach across the globe with conventional strikes, in situations where the PRC may not have as many bases available to it as the USAF currently does.
Then there is also the elephant in the corner of the room, which is that there may one day come a time later in the 21st century where the ability to conduct bombing of the continental US becomes a viable operational option by virtue of a shift in geopolitical alliances or the way in which a future conflict may evolve -- in such a situation, I'm sure the PRC govt would be very glad to have an aircraft that has the range to carry out that option if it needs be.
So I see having an "intercontinental range" for H-20 as allowing it to both conduct regional missions and also global missions, where regional missions will obviously be the mainstay of PLA concerns in the foreseeable future, but where global missions may emerge in the longer term future which the H-20 would likely have been designed to be capable of doing if required.