Introduction to Hu Guang and "A Journey to Yangshan": Zhu Di ordered Hu Guang and three other bachelors to inspect the stele materials of Yangshan. Hu Guang's "A Journey to Yangshan" clearly records that "the emperor broke the stone because of the construction of the stele Xiaoling Mausoleum". Located on Yangshan Mountain in the northeast of the capital, it is fourteen feet long and has a strange appearance... its color is as dark as lacquer..."