A park in Beijing has installed toilet paper dispensers with facial recognition to stop visitors from taking too much loo roll, media reports say.
Machines at the Temple of Heaven park scan visitors' faces before dispensing a fixed length strip of paper.
The tourist attraction is reportedly frequented by visitors who take large amounts of loo roll home.
It has reignited debate over the lack of social graces among some Chinese.
Park officials have installed six machines at its public bathrooms in a half-month trial, with staff on standby to explain the technology to visitors. The park has retained its existing loo roll dispensers.
The new machines, placed at the average heights for men and women, dispense strips of toilet paper measuring about 24 to 27.5 inches to each person. They will not dispense more paper to the same person until after nine minutes have passed.