why wouldn't this be equipped with weapons. CH-7 is also optimised for stealth if one considers the WZ-7, WZ-8 and WZ-9 to be too observable and less survivable in various ways. Well the CH-7 is there to fill in the role you expect from this platform.
I'm not inherently against the idea of this thing having any sort of weapons bay, for example, maybe one or two very small weapons bays for a couple of SDB sized weapons.
But this thing would be wasted as a striker -- the central fuselage is far too small to accommodate any meaningful payload.
Also, the PLA has plentiful other methods of conducting long range strike both now and into the future.
If range is the question, this aircraft looks like it has intercontinental range if it's not carrying significant air to ground payload. It's B-2 sized.
Larger than a B-21. China does not need that sort of ISR range on redundunt inter-atmosphere platforms unless its shooter platforms are going over to the US.
Doing 12-24 hour ISR missions at second island chain distances, while operating from safe(r) airbases within the Chinese mainland, would certainly require an aircraft of this size.
The importance of survivable, long range, long endurance and persistent ISR and networking nodes cannot be underestimated in a high end conflict.
If anything I would say for the PLA at present, having a robust westpac (2nd island chain distance) persistent and survivable ISR platform is more important to them than having a symbolic token intercontinental strike capability.
Loiter time and range of CH-7 covers more than what China needs out of a stealth ISR platform. We should remember that China can build many hundreds of CH-7 if it wanted to and achieve the required sortie rates. I don't see PLAN operating outside the second island chain from a strategic needs perspective. CH-7 covers this. ISR drones are getting onto LHAs and the Fujian. Not to mention WZ-8 is H-6 launched which gives you a second long reach, redundunt, inter-atmosphere ISR backup if all satellites are down.
The platforms you are talking about do not have the range or persistence for the sort of westpac missions the PLA will want to do.
CH-7 at 10 tons is too small as a long endurance and long range platform.
WZ-8 is too primitive for long term use -- I expect WZ-8 in coming years to be replaced by a more capable, more conventional high speed ISR UAV solution.
003 and 076 carrying some ISR drones is fine, but they are also dependent on their carriers and should be viewed as complementary to true high end strategic ISR.
I would speculate that this thing is evaluating a role for low end unmanned H-20. Perhaps even recycling some elements of preliminary experimental designs from the H-20 program and adapted for unmanned. Think of it has a super long range GJ-11. GJ-11 flies faster judging by its WS-13/WS-21 non afterburning variant engine and wing sweep angle. PLA is missing a strategic ranged stealth strike UAV. GJ-11 doesn't have the range to fly into New Delhi and back. This thing can fly to Kerala and back... to Liaoning. It has a sweep angle even more optimised for range and lift than the B-2's.
If they wanted this thing to be strike oriented, it would likely have a larger central fuselage relative to its overall wing/size.
That said, I'm not opposed to the idea of a larger "super GJ-11" -- but its planform geometry would probably not look like this WZ-X and be more like B-21 or B-2 instead in terms of proportions.