What's the name of the little red rope in the book?

It is called bookmark belt, which is a thin fabric belt. One end is attached to the zenith ridge of the book block, and the other end is not fixed, which is similar to a bookmark.

The types of books are divided into:

Philosophy, social science, politics and law, military science, financial management, historical geography, cultural education, primary school cultural education, junior high school cultural education, language and writing, China literature, foreign literature, music, artistic sculpture, photography, film and television, dance and drama, calligraphy seal cutting, natural science.

Mathematical chemistry, medicine and health, agricultural science, industrial technology, computer technology, construction engineering, life and leisure, children's books, college and middle school textbooks, New Year pictures calendars, imported books, periodicals, Hong Kong edition books, and opera sketches.

Science, history, cultural relics, astronomy, geography, people, fairy tales, myths, novel philosophy, social science, politics, law, military, religion, economy, history, geography, agricultural science, industrial technology, transportation, aviation, aerospace, environmental science, safety science and so on.