Literature is a carrier that records human knowledge by means of words, figures, symbols, audio and video, or is understood as knowledge solidified on a material carrier. It can also be understood as the floorboard of all social historical materials in ancient and modern times. Now it is usually understood as the sum of books, periodicals and other publications. Literature is the most effective means of recording, accumulating, spreading and inheriting knowledge, the most basic and main source of information in human social activities, and the most basic means of information exchange and dissemination. Because of this, people call literature the material basis of information work. In addition, literary magazines are the core periodicals in Chinese.

The papers and monographs mentioned by the landlord can be regarded as documents.