Introduction to the inscription: A giant stone book 2.4 meters long and 1.8 meters wide. Inscribed on it is a section of "The Records of the Stone Drum Academy" written by Zhu Xi, a master of Neo-Confucianism, who gave lectures here in the 14th year of Chunxi reign of Emperor Xiaozong of the Song Dynasty (1187). . Opposite the stone book is a "national treasure" ancient ginkgo tree. Experts estimate that it is 450 years old.