This matches exactly with what I'm seeing on my own sites too and it's from all over the world, not just China.
(I described my bot woes a few weeks ago at https://news.ycombinator.com/item?id=43208623. The "just block bots!" replies were well-intentioned but naive -- I've still found no signal that works reliably well to distinguish bots from real traffic.)
(I described my bot woes a few weeks ago at https://news.ycombinator.com/item?id=43208623. The "just block bots!" replies were well-intentioned but naive -- I've still found no signal that works reliably well to distinguish bots from real traffic.)