The scientific pictorial in The Secret of the Treasure Gourd was donated to the class library by the protagonist Afan and his classmates. The Secret of Treasure Gourd is a children's adventure novel by Chen, a famous writer in China. According to the plot description in the novel, in the story, the protagonist Afan and his classmates raised money to buy the Science Illustrated in the school library, rather than a specific person donating it to the class library. So the source of the book should be the efforts and support of the whole class.