History not only refers to everything that happened in human society in the past, but also refers to people's reduction and explanation of the former. The former is gone forever, and later generations cannot reproduce it by experimental methods. Therefore, what people can do is to reconstruct the original appearance of history as truly and completely as possible according to historical sites. This reconstruction effort has become history. It may be far from the truth or infinitely close to the truth, but it will never be equal to the past. This reminds us that people should always remain humble in the process of reconstruction.