Official website of Nanyang Social Security Bureau shows that residents' health cards are free of charge. Residents' health card is a basic carrier of personal information based on electronic health records, electronic medical records and three-level information platform proposed by "352 1 Project" of national health informatization. It is necessary to realize cross-system, cross-institution and cross-regional interconnection and information sharing of medical and health services, and it is a CPU card that can be recognized by computers.