I heard rumors about it and couldn't quite believe it but here it was a toilet paper dispenser with payment via WeChat. I was lucky that my wife put 10 RMB on it foresting purpuses because otherwise I would probably need to call her to come in and pay for it.

It was 3.8 RMB and you get a small package of wet tissues. I have no idea if they dissolve as easy as normal toilet paper but I like the Japanese way with water bidets better.
On the way out I also realized that there is another dispenser for normal toilet paper at the entrance -you also pay for it with WeChat, not sure probably it's cheaper, sneaky.- ah no it says scan it for free paper, I guess it's played by advertisement.

Anyway cool mall here l, very flashy in the middle of Changchun by the train station.

A report in 2017 said that a park in Beijing has installed toilet paper dispensers with facial recognition to stop visitors from taking too much loo roll, media reports say.
In September this year, reports show that there is a next phase of commercializing and surveillance: China's public toilets exchange tissue for ads -- (1 min, here is an Invidious link)