Introduction to Xuanshi Slope: Xuanshi Slope was left by Zhu Di, the founder of the Ming Dynasty, during the Northern Expedition to worship heaven and ancestors in the first year of Yongle (1403 AD). It is a lying cow-shaped flower 450 cm long and 400 cm high. The three characters "Xuanshi Slope" are engraved on the granite, which is vigorous and powerful. It is located in Changtu Silsumu, 15 kilometers east of Mandu Latu Town.