In the video filmed in Zhengzhou City, central China's Henan Province on November 1, a total of 2,520 students from SIAS International University opened umbrellas in two different colors to form a giant QR code. The code was successfully scanned, breaking the record for "the largest QR code made by human individuals." QR codes are now used for all sorts of services in China, like exchanging business cards and renting bikes.