When talking about the similarities and differences of historians' achievements and influences, Liu Zhiji said: "There are three ways to make history serve people. What is this? Promote good and suppress evil, and do not avoid powerful imperial power. If Jin is Donghu and Qi is Nanshi, this is also on it. The arrangement is successful, and the depression is immortal. If Lu's son is Qiu Ming and Han is a dragon, this is the second one. A man of great ability is learned and has a good reputation for a while. If the history of Zhou is lost, Chu will rely on it. " Shi Tong divided "history as a service" into three levels, which reflected his historian's values, namely, he valued the historian's straight writing spirit and the influence of his writings, thoughts and speeches on that time and later generations. Of the six people he mentioned, Zuo Qiuming is said to be the author of Zuo Zhuan, so he can mention it with Sima Qian. The Lost History of the Zhou Dynasty, as he said, is said to be the lost history of Taishiyin in Zhou Wenwang and King Wu. Dr. Shu Xiang of the State of Jin quoted Wei Shi's remarks in Mandarin Zhou Yu Xia, that is, "If you are respectful, if you are frugal, if you are democritus, you will be arrogant." Thus, Shi Yi was a famous historian until the Spring and Autumn Period. It is the first time for Liu Zhiji to comment on the achievements of historians and their social and historical influence from the above aspects. Later, he commented on historians in theory and made some contributions. However, Zhang Xuecheng's theory of "judging the gains and losses of historians by understanding and memory" has methodological value of historians' criticism.
There are many historians in the history of China, and China's historiography has rich theories of criticizing historians. Over the years, China historians have closely followed the footsteps of China's history and recorded the course of China's history, leaving a glorious history for the development of human civilization.