A system would make it possible to track a citizen's health status and keep their travel records.
A QR code is a type of barcode that can be scanned and processed by smartphones. According to the paper, a green code indicates a healthy status while yellow and red mean the person must quarantine. China has been using the method to keep track of the health status of citizens and their travel records since February.
On Saturday, Chinese President Xi Jinping proposed using a digital health code system as a “fast track” for orderly travel between countries while calling for stronger international coordination to reestablish cross-border movement amid the coronavirus pandemic.
Xi addressed other world leaders at a virtual meeting for the G-20 Riyadh Summit when he said that a QR code system could help open up travel by allowing for coronavirus test results to be recognized internationally.
China has reported 86,414 total confirmed coronavirus cases as of Saturday. It was not immediately clear whether other countries would take part in the system.