The electronic health card is a resident electronic health card. Residents' electronic health card is a national unified service card designed by the National Health and Wellness Committee for urban and rural residents in China, which records residents' identity information, health file information and medical information. Wang Yao is applied to store identification, basic health information storage, cross-regional and inter-institutional medical care, expense settlement and financial services in medical and health service activities. It is the link and key to realize information exchange and sharing between residents and medical institutions, between medical institutions, between medical institutions and social public services and other related departments.