The plane at the top is the Xian H-6I, which was to test the possibility of equipping an H-6 with 4 engines, the one in the middle is the Xian H-7 (WS-6J powered version), while the bottom plane is a version of the Xian H-7 with six turbofans. The H-7/H-8 designations were in some books misused for the H-6I, but the H-6I was a different plane than the H-7 design, and Andreas Rupprecht's book Dragon's Wings adds more info about advanced derivatives of the H-6.
Facing aircraft carriers from the U.S. Navy, Royal Navy, Indian Navy and Japanese, China is looking for a counter. The Chinese Navy (PLAN) has developed a unique 'Carrier Killer' weapon for its H-6 strategic bomber.
Still wonder why China does not develop rotary launcher or basically enlarge the internal bay of the H-6 family bomber to allow internal carriage of cruise missile. Or maybe make a smaller cruise missile to fit in it.
Say the enlarged bay that allows carriage of maybe just 4 KD-20 class missile.. that makes the warload potential to be like 10 Cruise missiles.
I think not using the internal bay for guided munitions is really a lost opportunity.
Is this an actual aircraft or a what-if? It's hard to see how the project would make sense - the entire wing and carry-through structure would have to be redesigned and the relocated thrust-line would probably require changes to the tail. If you're redesigning the wing structurally, it probably wouldn't make sense to keep the 60 year old aerodynamics. So what you have left over is the fuselage fore and aft of the wing - a clean sheet design would make more sense.
And before anyone brings up the Nimrod 2000 or B-60 to demonstrate that this level of redesign can make sense, those didn't really work out well did they?