Introduction to the stone steps at the entrance of the cave: According to the "Book of Wei: Wuluohou", in 443 AD, Emperor Taiwu Tuoba Tao, the third generation monarch of the Tuoba Xianbei Dynasty in the Northern Wei Dynasty, received a report from an envoy from the northern Wuluohou Kingdom. , in a cave deep in the northern dense forest, the old ruins where the Xianbei ancestors lived were discovered. Therefore, Emperor Taiwu sent Li Chang, the minister of Zhongshu, to lead the people on a long journey of more than 4,000 miles. On July 25th of this year, I finally arrived in the Daxianbei Mountains in the northeast. In front of the old stone chamber of my ancestors, in accordance with the highest sacrificial ritual stipulated by the dynasty, three animals, horses, cattle and sheep were worshiped. Amid the sounds of prayer, the ceremony was held A solemn and solemn ceremony to worship heaven and ancestors. Before leaving the cave, Li Chang carved 19 lines of blessings with a total of 201 words on the stone wall at the entrance of the cave. Comparing the texts in Jingmi Wenping and "Weishu·Li Zhi", although there are slight differences, the basic content is consistent.