Chen pu's "eighteen years later in puzhong" frequently appears in various historical records and local Chronicles, and most scholars cite it as chang. Based on the collected works of Mr. Shitang, this paper explores the relationship between Chen pu and puzhong from the aspects of Chen pu's life experience, friends circle, and the origin of his disciples, so as to reflect the original historical situation of Chen pu, a descendant of the song dynasty.