In an odd sequence of events, I've sorta got a weird tiny following in China due to having a vintage camera stall in an antiques market here in Wales that gets shared on Xiaohongshu (https://en.wikipedia.org/wiki/Xiaohongshu) sometimes when I have Chinese customers. So I'd feel bad blocking the entire country myself, though thankfully I'm not being inundated with traffic from there yet - the most egregious bots I've caught so far are actually ones from Meta which ignore robots.txt.
Yeah Meta's bots are well and truly stuck in the blackhole on this site at the moment. I have no idea what they're supposed to be doing, but in case they are using them for AI work I've just added a token multipler based on subnet totals so they can have some more fun. I might come up with some other fun response types for them too.