According to legend, Lao Tzu trained Yi Xi, the general commander of Hanguguan. After that, I went west to Kunwu (now zhouzhi county, Xi City, Shaanxi Province). Seeing the ups and downs of the mountains and rivers (Zhong Nanshan Tianyu River) and peaks here, I stopped here and made grass for this building to practice the scriptures. Spread to this day, it is called Louguantai. It is the first batch of national key cultural relics protection units, national AAAA-level tourist scenic spots, and contains more than 300 inkstones of scholars and poets in past dynasties. History is called the birthplace of Taoism. Lao Tzu was buried in Xilouguan, eight kilometers away from here, and there is still the existing Lao Tzu's tomb.