Expansion: The emergence of electronic health cards makes it easier and faster for patients to seek medical treatment. By storing personal health information in electronic form and sharing it among various medical institutions and platforms, patients can reduce the tedious process of filling out forms repeatedly and view their health files and medical records anytime and anywhere. In addition, the electronic health card can also integrate a number of medical services, which is convenient for patients to make an appointment online, check the examination results and issue electronic prescriptions. This convenience not only improves the efficiency of patients seeking medical treatment, but also contributes to the rational allocation and management of medical resources. However, in order to protect personal privacy and information security, the data transmission and storage of electronic health cards need to take strict encryption and protection measures to prevent the risk of information leakage and abuse.