Legal basis: Guiding Opinions of the State Council on the Joint Prevention and Control Mechanism of novel coronavirus Epidemic Prevention and Control on Normalization of COVID-19 Epidemic Prevention and Control. Strengthen support and guarantee 16. Give play to the role of big data. Relying on the national comprehensive government service platform, we will comprehensively promote the implementation of mutual recognition of "health code" and "one code" in various places, and share the information of nucleic acid and serum antibody detection results and key personnel in the "health code" database in time to promote the safe and orderly flow of personnel. Do a good job in the popularization and application of the entry version of the national comprehensive government service platform "epidemic prevention health information code" and strengthen the closed-loop management of the entry personnel. Legal analysis: Identifying the identity by scanning the health code is also used to judge whether the health code is presented by me in real time, rather than by taking screenshots. A good national comprehensive government service platform