Twenty-four histories are divided into twenty-four biographical official histories, namely Historical Records, History of Han Dynasty, History of the Three Kingdoms, Jin Shu, Book of Song Dynasty, Book of Southern Qi, Liang Shu, Chen Shu, Shu Wei, Book of Northern Qi, Zhou Shu and Zhou Shu. This history book, with 32 13 volumes and about 40 million words, records historical figures and important historical events from the Yellow Emperor to the late Ming Dynasty. Some of these historical documents are unofficial, such as "History of the South" and "History of the North", which were originally written by li yanshou in the Tang Dynasty and later classified as official. Most of this official history is a history book compiled by the government at that time, and there are often inconsistencies and contradictions. In addition, this twenty-four history can be said to be a voluminous history book, and the number of volumes also includes tables and records, which has played a certain auxiliary role in reading and understanding history.