Dystopia starts with 23.6 inches of toilet paper. That’s how much the dispensers at the entrance of the public restrooms at Beijing’s Temple of Heaven dole out in a program involving facial-recognition scanners—part of the president’s “Toilet Revolution,” which seeks to modernize public toilets. Want more? Forget it. If you go back to the scanner before nine minutes are up, it will recognize you and issue this terse refusal: “Please try again later.”