Such as: Saint Amethyst, Hundred Family Names, Reading Pictures, Reading Cards, Intellectual Development, etc.
Two, ideological and moral education books, that is, books to help children realize the process of socialization and establish correct values, outlook on life and aesthetics.
Third, popular science books refer to books that impart and popularize scientific knowledge.
Such as "100,000 whys" and so on.
Four, the dissemination of human history knowledge books.
Up and down for five thousand years.