I am surprised that I haven't posted this, have been looking at it for a while. I've always thought it would be Ilex, but I can't come up with anything that looks like it, and I end up at impossible suggestions in the Flora of China key. I could go back and pull apart some fruits if need be, but it seems pretty distinctive. This shrub is stuffed in with several plants growing on the corner of a private property a few blocks from me. The leaves, maybe 8cm long, are slender, lanceolate, stiffer than they look, entire but wiggly margins. I thought that the fruits were hanging single, but I can see the inflorescence structure in the background of the last photo.