Because there are three slightly raised mounds near the site of Sanxing Village in Sanxing Town, and these mounds look very neat, like three stars in the sky, so this site has the title of Sanxingdui. Sanxingdui site is located in the northwest of Guanghan City, Sichuan Province. 1934 was excavated for the first time, and then it was shelved for a long time until 1963. 1980 was officially named "Sanxingdui Culture", which is also known as one of the greatest archaeological discoveries of mankind in the 20th century. Because the cultural relics unearthed in Sanxingdui are not recorded in history, many of them are shocking to the world, such as bronze sacred trees, gold scepters, gold masks and various exquisite jade articles, so it is impossible to attribute these cultural relics to which dynasty. Therefore, archaeologists deliberately refer to all the cultural relics unearthed in Sanxingdui as "Sanxingdui Site Cultural Relics". Sanxingdui site is the longest pre-Qin settlement and city in Chengdu Plain, and the largest known bronze age ancient site in the upper reaches of the Yangtze River. Sanxingdui culture, represented by Sanxingdui site, is the earliest bronze culture in Sichuan Basin and occupies an important position in China Bronze Age archaeology. According to archaeological findings, Sanxingdui culture can be divided into four stages: one, two, three and four. According to cultural categories, it can also be divided into Baodun culture, Sanxingdui culture and Twelve Bridges culture. The division of Sanxingdui culture plays an important role in understanding the relationship between Sanxingdui and local bronze culture and Neolithic culture in the pre-Qin period, and also lays a foundation for perfecting the development pedigree of Sichuan ancient culture and determining the formation of Bashu civilization.