" Digital Sentinel " at work. Photo by Chen Congyao (Fighting against New Coronary Pneumonia) Keeping the " Shanghai " Log: " Digital Sentinels " weave an " epidemic prevention network ", Shanghai lays out normalized epidemic prevention and control China News Service, Shanghai , May 5th ( Chen Congyao ) At the entrance of the Xuhui store of Shanghai Carrefour Supermarket, the " digital sentinel " is busy on duty. Customers show the application code and they scan it, health code , body temperature, antigen report, nucleic acid report and other information It immediately showed that everything was normal,...