Cool, this is super helpful. Yeah, Dixingren sort of have to function pretty much like humans with the way they're able to pass for humans so easily for such long periods of time, that was my thinking. Nice to have it laid out like this though.

(Maybe he's even part of the anti-Envoy faction and spreading anti-Envoy sentiment due to disapproving of Shen Wei's suggestions of schooling?)
I could see that. It seems like somebody's been stonewalling the schools idea, and he's sneaky enough to do that without being obvious about it, and he sure wouldn't want Dixingren to be able to access education and realize they've got a raw deal and things could be improved. gross