All students and staff in the district are required to enter the campus with a valid "health code" to build the first line of defense for campus epidemics, campus epidemics using big data analysis, can do "one person, one case". The Education Bureau has developed and activated the "campus health code", which integrates all kinds of complicated statistics, such as health data statistics and epidemic investigation, into the "campus health code" online platform, and gives play to the platform's functions of on-line collection, on-time reminder, one-key summary, and comprehensive analysis. Generate personalized "Health Code". The "campus health code" online platform relies on the enterprise WeChat, the Internet strings "bureau, school, class, home", to realize the four levels of interconnection.