The editor wants young friends to be readers of this book, so he tries to describe the history of science in plain language to facilitate reading. In the selection of illustrations, many pictures come from ancient books, and there are books to test; At the same time, it also chooses a simple description of modern people, which not only reflects the respect for history, but also reflects the aesthetic feeling of the picture; I had to choose some self-drawn illustrations. From planning and writing to editing and textual research, this book took three years to reach Fu Zi.