As for the books about the Western Zhou Dynasty, we can know from Historical Records that they are probably introductory books, and then we can read Shangshu, which is the earliest historical book, divided into two parts, the past and the present, and the time span is from Yao and Shun to the Eastern Zhou Dynasty. There is also a controversial book called Annals of Bamboo Books, which records the history from Xia Dynasty to Warring States Period. Some views are extremely subversive and belong to the Spring and Autumn Period and the Warring States Period.