In China, the government is using software, run on Alipay and WeChat's platforms, to track people's movements and prevent the spread of coronavirus.
Anyone that wants to travel around is required to fill out a health survey on the app, which depending on their health status and travel history, will then generate a color code – Green, Yellow, or Red. These codes dictate whether a person can travel freely, should stay at home and isolate, or is required to stay in quarantine.
And increasingly, malls, cafes, and restaurants in China are requiring customers to show their codes on the app before they are able to enter these areas.