The Spring and Autumn Period is one of the historical stages of China. There are generally three kinds of opinions about the beginning and end of this period: one thinks it is 770-476 BC; One view is that from 770 BC to 453 BC, Han, Zhao and Wei lost their wisdom; Another view is that from 770 BC to 403 BC, Han, Zhao and Wei were divided into Jin. Lu historians recorded the major events reported by various countries at that time by year, season, month and day, and recorded them in spring, summer, autumn and winter in a year. In a word, they named this chronicle Spring and Autumn Annals.