Signs and slogans in the zoo

Animals are our friends, and we should protect them with our heart. No business, no killing.

Public service advertisement is an advertisement designed for the purpose of seeking public interests and improving welfare benefits. It is an advertisement for an enterprise or social organization to explain its functions and responsibilities to the society to consumers, indicating that it not only seeks profits from business, but also asks and participates in how to solve social and environmental problems. It refers to advertisements that serve the vital interests of the public and social customs without making profits. It has three characteristics: social benefits, realistic themes and attractive performances.