The "e;Blue Key"e; Popular Science Series introduces the relevant marine knowledge and culture in a relaxed and humorous way. It guides young readers to know the ocean, understand the ocean, get close to the ocean, treat the ocean kindly, and improve the comprehensive quality and scientific and cultural literacy of children. It is hoped that through this project, the concept of "e;happy popular science"e; will be conveyed to young people, so that children can understand scientific knowledge and the importance of science while reading.