The annals and biographies of history books were two different styles of history books. The annals of history books referred to history books that used the annals as the basic style of history books. This style of history books usually arranged the time of events according to the chronology and indicated the time of each event at the time of each event. For example, the Records of the Historian was one of the representative works of the historical chronicle. It recorded the major events of each dynasty in Chinese history in time order. Biography style refers to the history books that use biography style as the basic style of history books. This style of history books usually records the deeds and contributions of each character and shows the development of history through the relationship between the characters. For example, Han Shu was one of the representative works of biographies. It recorded the political and military figures of various dynasties in Chinese history in the form of biographies. There were differences in the structure and content of history books between the annals and the biographies. The annals of history books paid more attention to the accuracy and cohesiveness of time to show the development of history through the order of time, while the biographies paid more attention to the deeds and contributions of the characters to show the development of history through the relationship between the characters.