1 can be traced back to the earliest inscriptions carved on stones, wood, pottery, bronzes, palm leaves, bones, birch bark and other things. The use of papyrus greatly promoted the development of books. Around the 30th century BC, Egyptian papyrus scrolls appeared, which was the earliest embryonic form of Egyptian books. The papyrus scroll is closer to the concept of modern books than the clay tablets of Sumer, Babylon, Assyria and Hittite.

Step 2: Simple strategy

The earliest official book in China was The Concise Strategy, which appeared around the 8th century BC. The simple strategy of using bamboo and wood as writing materials was the main form of books in China before the invention of paper.

Extended data

1, divided into social science and natural science books by subject.

2. According to the language, it is divided into Chinese documents and foreign documents.

3. According to the purpose, it is divided into ordinary books and reference books.

4. Divided by content: novels, children's books, non-fiction, professional books, reference books, manuals, bibliographies, scripts, reports, diaries, book collections, photography and painting collections.