It depends on region (and date of visit), I guess. I was in Beijing 2 years ago (so slightly pre Covid) on a business trip and while there are negatives, the toilets there were great.
I guess that’s because Beijing is a rich region, I really don’t know, were not anywhere else
Beijing gets a lot of care because that's where the rulers live and where a lot of tourists go. It got cleaned up a lot before the 2008 olympics because it was showcasing China.
I guess that’s because Beijing is a rich region, I really don’t know, were not anywhere else