The cliff inscription of "Family Trigram" is carved on a natural mountain rock, written by Sima Guang, a historian of the Northern Song Dynasty, and is well preserved. The rock is 5.9 meters high and 9 meters long, facing north. Next to it, there are also inscriptions such as Qintai, Sansheng Stone, Leji, Zhongyong, Yangzhou Ruan Yuan inscription, Tongcheng Shen Zhongyi inscription and so on. "Family Trigram" has a total of 202 characters, a width of 2.21 meters, a height of 2.71 meters, 12 lines of books, 17 characters per line, and a character diameter of more than 4 inches, the content is the way of self-cultivation and family management. The carved stones of Sima Guang's family are of great historical value for the study of the history of the Northern Song Dynasty.