There is an interesting discussion going on at Twitter and other forums after a satellite image of the Xi'an/XAC facility plant at Xi'an Yanliang was re-examined. The image take at around 2018 shows several (two at least ?) large missiles on the tarmac standing close to the H-6N bombers. Given their size, they are definitely wider in diameter and longer than the regular KD-20 ALCMs and resemble more the rumoured Ballistic Anti-Ship missile (similar to the DF-21D). Usually the missile is wrapped under canvas or some sort of tarpaulins but at least one seems to show its white wing tail-fins.
(Images by DigitalGlobe via Huitong's CMA-Blog)