The one who posted these additional photos, @Crosshairs十字线, actually clarified in a discussion with @兰墨飞花_星海入梦日出烟燧 (who is the first one to post the excerpts of this academic paper on Weibo) that the listed specifications and performances with the <4 meters of length and <0.85 meters of diameter (which is from Segment 6.1 of the academic paper) are actually parameters from the base variant.
On the other hand, the specifications and performances listed by @Crosshairs十字线 in his Weibo post (~4.67 meters long, 600 mm wide, 400 mm high) are the parameters of the new variant, which was enhanced/upgraded from the base variant and is found in Segment 6.2 of the same academic paper (but not posted by him).
TL; DR - If this missile does exist (instead of being just a technical research/study model), then this missile would likely be a Chinese counterpart to the JASSM/LRASM.
Yeah, I had a read of the conversations and I came away with that as a possible conclusion (that there are two variants of it, one being a smaller IWB variant and one being a larger variant).
But to be honest I'm not fully sure if it's decisive but maybe that's my difficulty making sense of weibo formatting.

