This cliff was written by Zheng Daozhao, a calligrapher of the Northern Wei Dynasty, and has always been valued by calligraphers. Ye, a scholar in the Qing Dynasty, said: "His pen is healthy, he can lick rhinoceros and kill dragons and snakes, but he swims vain, all by divine luck. In the early Tang Dynasty, Ou Yu, Chu and Xue were all under the cover, not only the first in the Northern Dynasty, but also only one person since the birth of Shishu. "