The author believes that true knowledge and knowledge cannot be separated from history. So this article takes the question sentence "the history can tell us what? "For the title, respectively, the interpretation of the historical function lies in the understanding of its people -- want to know what we are capable of, we must see we had done in the past what; history is not a fortune teller -- is the comprehensive reflection of many factors, and read history can not be guaranteed not sick, can improve the immunity; read what kind of history -- not simplified, especially not formula; finally, recommend books, simple introduces the Jian Bozan's the history of the Qin and Han Dynasties, cen mien of the Sui and Tang Dynasties history book as a reference for the readers. <<