Introduction to Yuchanyan: The Yuchanyan site is located in Shouyan Town, 20 kilometers northwest of Dao County, Hunan Province. It is a Neolithic cave site with simple cultural nature and rich cultural connotation. The discovery and excavation of the site caused a sensation in the world. It was rated as one of the 100 most important archaeological discoveries in China in the 20th century and one of the top ten new archaeological discoveries in the country in 1995.