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. Xi was once the political, economic and cultural center of China in ancient times, and was called the four ancient capitals of the world together with Athens, Rome and Cairo. From the Western Zhou Dynasty, when slavery reached its peak, to the Tang Dynasty, when feudal society reached its peak, 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+.

About 1 1 century BC, Zhou Wenwang established Fengjing on the west bank of the Fenghe River, and after the King Wu succeeded to the throne, he destroyed the business and established Haojing on the east bank of the Fenghe River, which created Xi 'an's long-term historical position as the political, economic and cultural center of ancient China. In 84 1 BC, Haojing "China Uprising" was the earliest large-scale uprising to expel the king in the history of China. The "rule of Cheng Kang" in the early Western Zhou Dynasty marked the heyday of slavery society in China. Qin Xiaogong's "Shang Yang Reform" was a major social reform for China to enter the feudal society. The "Zhenguan Rule" and "Kaiyuan Rule" in the Tang Dynasty marked the peak of China's feudal society. In BC 138, Emperor Wu of the Han Dynasty sent Zhang Qian to the Western Regions and officially opened the Silk Road, which started from Chang 'an and connected Eurasia.

In most dynasties, Xi 'an was subordinate to Jingzhao Prefecture (county), which was a county-level organizational system. In the Yuan Dynasty, Jingzhao was changed to Anxi Road (later changed to Fengyuan Road). In the second year of Hongwu in the Ming Dynasty (AD 1369), Fengyuan Road was abandoned and xi Anfu was established, hence the name An.