Carving the words directly on the cliff wall is called "Cliff". For example, Ode to Shimen in the Han tablet, and the poem and title of Yunfeng Mountain written by Zheng Daozhao in Wei Bei. Xuanhe Pu Shu Zhengshu No.1: "Sui Liang (Chu Suiliang) likes to write official books, and his cliff monument is in Xiluo Longmen."
Cliff carving is also considered as a spell to suppress geomantic omen.