Communication, big data, mobile phone unauthorized inquiry, others can not find it?

Normal users cannot find it. Before entering the city, everyone turned on their mobile phones and displayed the "little green label" in the health treasure/health code. When traveling in different places, everyone uses mobile phones to locate and query the information content of nearby pneumonia epidemic; After the patient is diagnosed, government departments use cloud computing technology to track close contacts ... Since the outbreak of lung infection in COVID-19, the word "big data screening" has just become popular, and many people have added "communication big data travel cards" to the most commonly used mobile phone software. The software cooperates with China Communication Network Research Institute, China Telecom Network, China Mobile Communication and China Unicom to provide customers with travel inquiry service, which gives full play to the key role of locking the source of infection, keeping close contact with people and preventing the spread of pneumonia.