2. Due to the invention and popularization of papyrus, people no longer use mud, stone, wood, pottery, metal and other materials to record words or pictures, but also spread and save a lot of ancient information. It was not until China's papermaking spread to the Middle East that papyrus was replaced.
3. Paper: the general term for paper. Paper is counted by sheets, so paper is generally divided into: letterpress printing paper, newsprint, offset printing paper, coated paper, book cover paper, bible paper, copy paper, paperboard and so on. Sheets made of plant fibers are used for writing pictures, printing books and newspapers, packaging, etc.