That’s actually cippi’s photo, originally posted here.
I’ve found some of my own photos on Neal’s feed too, like pretty much the entire set of photos at the beginning of this thread. If I understand correctly, what happens is someone copies the photos to forums in .cn, Neal finds them there, and he posts them to his feed. And this is why I’ve been considering adding a watermark of some sort on my images from now on, perhaps with the original URLs on them. They’ll still get copied, but at least it’ll point back toward the original source.