1. Due to the value orientation of feudal thought, emperors will be the main body of historical events.
2. Due to the limitation of space and carrier preservation, many people in mass incidents are unknown, and some problems are described in detail, but their importance is not realized.
Objectively speaking, historical figures are the product of the historical era and one of the representatives of the times. In them, we can see the characteristics of many times, and their success or failure can be judged not only by the praise at that time, but also by future generations. In a word, history is created by the people. In ancient history, the development of culture and science mostly recorded the wisdom of the people.