Xi 'an, known as Chang 'an in ancient times, is also known as Xi Du, Xijing, Daxing City, Jingzhao City and Fengyuan City. It is the city with the most dynasties and the longest duration in the history of China. From the Western Zhou Dynasty, when slavery peaked, to the Tang Dynasty, when feudal society peaked, there were 12 dynasties, including the Western Zhou Dynasty, Qin Dynasty, Western Han Dynasty, Xin Dynasty, Western Jin Dynasty (Yu), former Zhao Dynasty, former Qin Dynasty, later Qin Dynasty, Western Wei Dynasty, Northern Zhou Dynasty, Sui Dynasty and Tang Dynasty, and its capital reached 165438+. It is also the capital of peasant uprising regimes such as Chimei, Lvlin, Daqi (Huang Chao) and Dashun (Li Zicheng). From about 1 1 century BC to the end of 9th century A.D., An was the political, economic and cultural center of ancient China, and was always under the jurisdiction of local administrative organs-Zhou, County, Fu, Lu, Province, Chang 'an, Xianning and other counties.