Come to this unique world cultural heritage in Guizhou Province: Hailongyu. This is a ruins of the Toast Castle in the Song and Ming Dynasties. It is a testimony to the "Tusi System" of the management system of Chinese ethnic minorities in ancient times. To put it simply, here is the defensive castle built by the emperor of Zunyi (Bozhou) in the southwest of the Ming Dynasty. Strolling here, there is a combination of Peruvian Machu Picchu and Sri Lankan Lion Rock, so these three are called "City of the Sky"