Once you get those hypersonic aerial vehicles into service, you can get them to launch hypersonic munitions (based on gliding + motor) that will be very hard to intercept.
They won't be cheap to procure and operate. Though, we could see warplanes like this becoming more commonplace as associated technologies become more mature.
As for tankers, I think if you are going to do stealth tanker, it's expected then to operate from contested air space, then you need to make it carrier capable. Otherwise, why not just use YY-20A? Are you going to really fly a H-20 sized tanker 4000 km out to refuel? that takes so much time and uses a lot of fuel
Let's assume that the H-XX is a carbon copy of the B-2. The B-2 has a fuel capacity of about 75.8 tons, whilst having a MTOW of 170.6 tons.
The MQ-25, meanwhile, only has a transferrable fuel capacity of 6.8 tons at 900+ kilometers from its base carrier, despite having a MTOW of 21.8 tons. That's 31.2% of the MTOW dedicated for refueling other aircrafts - And that's is nowhere near being close to enough to refuel the B-2 for missions at extended/expeditionary distances.
To put it simply - The carrier-based aerial refueling UAV will need to be significantly bigger.
Going to the limit - Assuming a MTOW of 40 tons (which is around the MTOW of the J-XDS), and with 35% of the MTOW dedicated to transferrable fuel, that means a total of 14 tons of transferrable fuel.
Sure, you could also negate the shortcomings with numbers - But there are also other warplanes of the PLAAF and PLANAF that requires mid-air refueling to extend their
combat radii AND
mission durations as well, including but not limited to fighters that are escorting the H-XXs, plus other fighters (and even heavier U(C)AVs in the future) that are conducting other missions on the ocean.
However, there is also another factor at play - Those PLAN carriers won't be at sea all the time, and they certainly won't be at the right place all the time. So you can't just solely rely on carrier-based tanker UAVs, because there are always chances where the carriers basing those tanker UAVs isn't close enough if not isn't available when the H-XX needs them.
That's why having land-based tankers that can reach further out of bases on the Chinese mainland is crucial.
Of course, what I've suggested (stealthy tanker based on the H-XX) is more in the hypothetical realms, given that we have no such real-life examples in history so far. Technically speaking, the PLAAF could have the H-XXs topped-up by the YY-20s while still flying in the relatively safer skies within the 1IC and even up till the middle between 1IC and 2IC (assuming air superiority over the 1IC is secured), have them go to the 2.5IC or 3IC and lob their payloads against targets along the 3IC or beyond, before coming back to be refueled again in the same area and heading back to land at home bases.
