No need. Civilized and healthy, public service advertising posters don't need to add money. Posters, also known as leaflets, are printed materials for businesses to promote themselves. Public service advertising is an advertising activity that is not for profit and provides free services to the society. Since the founding of People's Republic of China (PRC), public service advertising activities have increased day by day, which has played an important role in the moral and ideological education of the whole society.