School milk's benefits and significance, milk is a completely nutritious food with ingredients closest to human breast milk. Milk is rich in high-quality protein, fat, lactose, calcium and other nutrients, as well as vitamins A, B, C, D, E and so on.

Propaganda is a kind of information expression technology that serves a specific agenda. In the west, propaganda originally meant to "spread philosophical arguments or opinions", but now it is most commonly used in political context (environment), especially in actions supported by the government or political groups.

When the same technology is used in enterprises or products, it is usually called public relations or advertising. Social behavior that uses various symbols to spread certain ideas to influence people's thoughts and behaviors. There are all kinds of publicity. According to the content of propaganda, it can be divided into political propaganda, religious propaganda, military propaganda, commercial propaganda, scientific and technological propaganda and so on.

Publicity adopts various propaganda means: face-to-face publicity between people, using language, posture, expression and other propaganda means; Publicity to the public should be carried out through mass media, such as newspapers, magazines, books and other printed media, as well as electronic media such as radio, television and movies.