Five minutes and twenty seconds. It’s both meaningful and appropriate. Public service announcements are advertising activities that provide free services to society without profit-making purposes. After the founding of the People's Republic of my country, public welfare advertising activities have increased day by day, playing an important role in moral and ideological education for the whole society, such as fire prevention and theft prevention, forest protection, birth control, maintaining public order, and not spitting carried out by relevant departments. All advertising and publicity are in the nature of public service advertisements. In 1979, media units across the United States took the initiative to donate space and time worth a total of US$600 million to the American Advertising Association for public service advertising. "Love China, build the Great Wall" is a creative and profound advertising slogan. On July 8, 1984, the "Repair the Great Wall" sponsored publicity event jointly organized by the Beijing Evening News, Badaling Special Economic Zone Office, Beijing Daily, Economic Daily, and Workers' Daily also had the nature of a public service announcement. The advertising industry in various countries around the world carries out public service advertising activities to varying degrees. Advertising serves the economy, but it also serves society, consumers, and the promotion of the construction of two civilizations. Carrying out public service advertising activities is the embodiment of establishing the above four service perspectives.