This plane is too small to deliver a meaningful amount of bombs, too slow for modern warfare, and especially too visible on the radar.
China doesn't have to develop a B-52 scale monster or an insane B2 style bomber, which costs more than gold. But they could at least try to develop something similar to the B-1B, it's probably not that hard. The British didn't have any experience in building large bombers or transporters, and it still managed to build the Concorde. China is probably able to to the same thing.
You realize B-1s are actually heavier than B-2s, right? Besides, supersonic bombers are Cold War thinking and is far too hard to maintain, espicially if it's swing wing and that big. The PLAAF should go for a USAF style NGB, smaller than the B-2 but as stealthy if not more so, with a good bomb load and has lots of room to develop and put in aesa radar and ew modules.
One of the reasosn the B-52 is still around is its sheer size and relative ease of maintenance. Now the PLAAF doesn't need something that size, and the USAF might not go for something in that class ever again, but that doesn't mean you can't design an aircraft to be modular, espicially from the ground up.
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And the H-6K, if it's able to deliver a variety of PGMs along with cruise missiles, will still be a pretty capable plane espicially with turbofan instead of turbojet engines, which will allow a far greater loiter time/range to attack targets which may present themselves (though this will be after air superiority over an area has been acheived, but there are scenarios other than taiwan the PLAAF could face in the coming century). In a taiwan scenario H-6Ks can still fire CJ-10s, which will just diversify the sources of cruise missiles the enemy faces which makes your own platforms more survivable while able to attack from more directions (in stand off distance, of course with the CJ-10s ~3000 km range or however much it is).
