It really varies. I just did a big tour of China in June and we saw many fancy, futuristic toilets in malls and hotels. We saw somewhat stinky but otherwise clean public toilets at parks and such. And we came across a couple of holes in the floor with a septic tank below ground, exposed to the air - and no TP provided. Those are rare now, from what I saw. (Septic tank was the word I couldn’t think of before) I’m no plumber though so I may be getting that word wrong still.