Common themes include: building a civilized city, banning smoking, voluntary blood donation by citizens, buying sports lottery tickets, Project Hope, speaking Mandarin, protecting cultural heritage, protecting things, customs, drug control, environmental protection, traffic safety, young volunteers, AIDS patients, water saving, honesty, social morality, helping the disabled, entertainment, food safety and anti-war.
Public service advertisement is an advertisement designed for the purpose of seeking public interests and improving welfare benefits. It is an advertisement for enterprises or social organizations to explain their functions and responsibilities to the society to consumers, indicating that they not only pursue the profit of operation, but also demand and participate in how to solve social and environmental problems.