Illustrated books. Picture books refer to books in graphic form, which are usually used for children's books and educational books. Picture books usually focus on images, and the characters and scenes in the picture can express more details and emotions through images and subtitles, which makes it easier for readers to understand and accept the contents of the book happily. Picture books, loanwords, that is, picture books, as the name implies, are "painting books", which refer to a kind of books with painting as the main part and a small amount of words attached. Picture books can not only tell stories and learn knowledge, but also help children build spiritual world and cultivate multiple intelligences. Picture books are the first choice for children's books in developed countries, and it is internationally recognized that "picture books are the most suitable books for children to read".