1. The unified empire model initiated by Qin Shihuang, after the transformation of Emperor Wu of the Han Dynasty, suddenly appeared the real unified. During the Western Han Dynasty, countries achieved unprecedented unity, which required academic culture to be sorted out and summarized through mutual absorption.

2. The main feature of academic activities in the early Han Dynasty was comprehensive work. After Emperor Wu of the Han Dynasty, his attitude towards academics was unified. Historical Records summarizes the long-term historical records in compilation and history, and reflects the national unity from Qin Shihuang to Han Wudi to the historical field.

3. The rulers of the Han Dynasty also needed a huge historical work to record the whole development of society from ancient times to the present, sum up historical experience, and use it as a reference for the society at that time to make up for the shortcomings.

Extended data:

Sima Qian studied under Kong Anguo and Dong Zhongshu in his early years, roaming around, learning about customs and collecting rumors. As a first-time doctor, he served in the southwest. In the third year of Yuanfeng (108), he was appointed as the Taishiling, inherited his father's business and wrote history.

He created China's first biography and general history book (formerly known as Taishi Gongshu) with the historical knowledge of "studying the relationship between man and nature, understanding the changes from ancient times to modern times, and making a family statement".

This book is recognized as a model of China's history books, which records the history of more than 3,000 years from the legendary Huangdi period to the fourth year of Emperor Wudi. It is the first of the "Twenty-four History" and is praised by Lu Xun as "a historian's swan song, and Li Sao has no rhyme".