Legal basis: Article 1 Scope of reference framework and technical guide for epidemic prevention codes This standard specifies the framework, technical requirements and data protection of epidemic prevention codes. This standard is suitable for people to fill in "personal epidemic prevention status" and obtain "epidemic prevention pass code" at one time through mobile phone applet. With the epidemic prevention password, they can enter and leave various public places, such as communities, offices, traffic checkpoints, airport railway stations and so on. To achieve rapid inspection requirements in different scenarios.