can this design is achievable now ? this looks really futuristic
TBH, that CGI which I posted above is largely similar to other CGIs of the H-20 available on the internet, including this one from a Chinese military magazine (which is what most netizens tend to associate with when talking about the H-20):
However, most of the H-20's CGIs available differs quite a significant degree to how the B-2 and B-21 look like, mainly on how the leading edges of the American VLO bombers are in simple straight lines originating from the nose, which is obviously contrasting to the leading edges of most H-20 CGIs that have increasingly larger angle relative to the longitudinal axis of the aircraft as the leading edges get further away from the nose:
I believe there are good reasons for why Northrop Grumman engineers chose such designs for their VLO bombers, and I believe that the engineers working on the H-20 at Xi'an AC should understand them as well.
However, doing so clearly reduces the overall length of the VLO bombers, which directly contributed to the significantly reduced length of the weapons bays on them compared to their non-VLO counterparts i.e. the B-1B, thus massively constraining the size of payloads that the B-2s and B-21s are able to carry. This is also among the reasons why the USAF is still keen on retaining the B-52s in active service for another few decades or so - Mainly as missile trucks for missiles that are too large to be fitted inside the weapons bay of their VLO bombers.
In the meantime, given how China have 100+ H-6K/J/N bombers in active service with the PLAAF right now, of which the oldest airframes can still serve for at least another 10-15 years - Having a new bomber which has to be able to carry large-sized missiles may not be a need that is as pronounced for the PLAAF as compared to the USAF.
Despite this, if the Xi'an AC engineers want the H-20 to be able to take over such roles from the H-6K/J/Ns as they approach retirement ages in the future - Barring the leading edges designs from the CGIs above, they could also straighten out the leading edges of the H-20 based on the CGIs above, which would result in something that somewhat resembles the #4 design (represented by Model D) in this extract taken from an academic paper conducted some years ago on various design possibilities of a new bomber type:
Which actually approaches to what 6th-gen fighters are typically being envisioned today (i.e. "Flying Doritos"), rather than the B-2 and B-21 designs (represented by Model C).
Of course, if Xi'an AC engineers are able to design the H-20 that aren't just VLO and able to travel in high-subsonic speeds, but also have a large payload capacity, then a H-20 design which resembles the CGI in my previous post or the Model D should do, IMHO.
Last but not least -
I am no aeronautics engineer.