Dude .. I went to some toilets in a chinese market ... I'm never gonna forget it
One the left, the toilets to pee in .. on the right .. pay to use loos with cubicles.
A huge (2ft wide, 3ft deep) trough runs through the left section, chucks a u-turn and then passes through the middle of each of the stalls of the right section.
You DON'T want to touch the walls. It's obvious that many people don't pay the cash (extra, in addition to the entry fee) for the toilet paper.
Also, there was no flush button. Flushing depends on patronage in the left section.
Wash basin? What's that? Just use your left hand.