Introduction to the Yongcheng Site in the Pre-Qin Dynasty: From 1973 to 1986, the Shaanxi Provincial Institute of Archeology conducted large-scale surveys, drilling and excavations on the Yongcheng Site, and initially understood the location, shape and scale of Yongcheng, as well as the three buildings in the city. Architectural ruins such as the grand palace area and suburban palaces, as well as the large-scale Qin Gong Cemetery and small tomb areas found in the south of the city.