The purpose of setting up World Health Day is to arouse the attention of all countries in the world to health problems, mobilize people all over the world to care about and improve the current health situation and improve the health level of human beings. During World Health Day, all member countries of the World Health Organization, including China, held celebrations to publicize and popularize health knowledge and improve people's health. The Organic Law stipulates that every year on World Health Day, the World Health Organization announces a publicity theme, and countries carry out publicity activities around this theme to promote the development of health undertakings.