Is the health code assigned by the system itself or manually?

It is allocated by the system itself, and the health codes of different places are generally built by provinces, and the development methods and data acquisition rules are different. However, it is basically inseparable from the following types of information: the State Council traffic big data travel card, residents' personal health report and place scanning code data, medical treatment and nucleic acid antigen information of the Health and Wellness Commission, basic residence and household registration information of residents of the Ministry of Public Security, travel traffic information such as airplane high-speed rail, and customs entry and exit information. Through national control and big data analysis, the international community knows where you have been, and then the system automatically assigns codes.