The biographies of emperors in Historical Records, referred to as "Ji" for short, are the special terms of biographies of emperors in biographical history books, which began with Sima Qian's Historical Records. In this book, biographies of emperors in past dynasties are called "XX Biography", but there are exceptions, such as not being emperors, but his biographies are also called "Ji". In addition, Xiang Yu was listed as a reporter because he thought he was like an emperor at that time.

"Chronology" is discipline and discipline. Take the deeds of the emperor and monarch as the program, and reflect the changes of dynasties and the general trend of the times in the form of chronicles. In fact, it recorded the words and deeds of emperors and the major events at that time in chronological order.

Its content is not simply the biography of the emperor, but its main function is to record the important events in the past in the form of chronology. As a chronological part of biographical history books, this chronicle actually runs through the outline of the book ~

Biography is one of the genres of China's biographical history books. Sima Qian first wrote Historical Records, which was used by later biographical history books. Textual research on Sima Qian's Historical Records: "Biographers refer to the deeds of people and ministers in order to pass them on to future generations." The meaning of Zhang Shoujie's Historical Records: "Its pedestrians can meet in order, so the clouds circulate." "

It is generally used to describe the deeds of people other than the emperor (where the prince can inherit, the historical records were originally listed as "aristocratic families", and the biographical history books of later generations were abolished as "aristocratic families" and collectively referred to as "biographies").

Shi Jia is one of the five major styles of Historical Records. There are thirty Shi Jia in Historical Records, which record the rise and fall history of major vassal states from the Western Zhou Dynasty to the early years of the Western Han Dynasty. "Shi Jia" got its name because "the princes founded the country and the descendants inherited it", that is, the titles of princes were passed down from generation to generation, hence the name "Shi Jia".