Expansion: The emergence of the eHealth card has made it easier and faster for patients to seek medical treatment. By storing personal health information in electronic form and ****enjoying it among various medical institutions and platforms, patients can reduce the tedious process of repeatedly filling out forms and view their health records and medical history anytime, anywhere. In addition, the eHealth card can also integrate several medical services, making it convenient for patients to book appointments online, check examination results and issue e-prescriptions. This convenience not only improves the efficiency of patients' medical treatment, but also helps the rational allocation and management of medical resources. However, in order to safeguard personal privacy and information security, strict encryption and protection measures are required for data transmission and storage of eHealth cards to prevent the risk of information leakage and misuse.