Sima Qian has nothing to do with Sima Guang. Sima Qian, a historian and writer in the Western Han Dynasty, was an official for generations in the Northern Song Dynasty. At the age of 20, he was the first scholar. But he didn't "boast that Kunming is ambitious, just like saying that it is too big to be self-sufficient". Instead, he boldly put forward: "When a saint is alive, he must do righteousness, show others with virtue, and spread evil abroad!" These words reflect the mind and knowledge of young Sima Guang, and he is determined to make contributions with benevolence and not seek false reputation. He is the author of Purple Tongzhi Sword. . Sima Qian, with a long word, began to study ancient literature biographies at the age of 10. During Yuan Guang and Yuan Shuo of Han Dynasty, he studied under the modern writer Dong Zhongshu's "The Spring and Autumn Annals of the Ram" and the ancient prose writer Kong Anguo. At the age of 20, he roamed south from Chang 'an, the capital, and traveled all over the Jianghuai Valley and the Central Plains, where he visited local customs and collected legends. Soon, he became a doctor, bodyguard and retinue of Emperor Wu of the Han Dynasty, and accompanied him to the Western Seas many times, and sent envoys to Bashu. In the third year of Yuanfeng (BC 108), Sima Tan, the stepfather of Sima Qian, was the official of Taishi, in charge of astronomical calendar and royal atlas, so it depends on the books collected by historians. In the first year of Taichu (before 104), he, Luo and others customized calendars to replace the Zhuan Xu calendar inherited by Qin, and the new calendar adapted to the needs of the society at that time. From then on, Sima Qian began to write historical records. Later, he was convicted, imprisoned and rotted for defending Li Ling who surrendered to Xiongnu. After he was released from prison, he worked as a secretary, continued to write angrily, and finally finished the writing of Historical Records. People call his book Taishi Gongshu. It is the first biography of China, which has a far-reaching influence on later historiography. Historical Records is an excellent literary work with vivid language and vivid image. Sima Qian also wrote a book, Bao Ren 'an, describing his imprisonment and his ambition to write a book, which was praised by all previous dynasties.