A health card is also called a resident health card, and the number on the card is the health card number. Residents' health card is an important livelihood project proposed by the national health informatization "352 1 Project", which is convenient for people to seek medical treatment. Health card is a card that collects residents' electronic health records, electronic medical records and personal information on the three-level information platform to realize cross-system, cross-institution and cross-regional interconnection and information sharing of medical and health services. It is mainly used for resident identification, basic health information storage, cross-regional and inter-institutional medical treatment, expense settlement and financial services in medical and health service activities.