City elevators to be fitted with QR codes

All 270,000 elevators in use in Shanghai will have a QR code by the end of September, allowing riders to alert authorities and maintenance workers when they are trapped. By scanning the Shanghai smart elevator code, they can access basic information about the elevator such as its location to report problems. It is expected that about 50,000 elevators in the city will have the code by mid-July, with all covered by the end of September.