Second, Xi 'an is the capital.
The title of the Western Zhou Dynasty is the collective name of the sealed well and Haojing built by Zhou Wenwang and Zhou Wuwang respectively.
In the Western Han Dynasty, Liu Bang took the meaning of Chang 'an Township and named it Chang 'an, meaning "long-term stability".
The new dynasty Wang Mang proclaimed himself emperor and once changed the capital Chang 'an to "Chang 'an".
The name "Chang 'an" was used in the Eastern Han Dynasty, the Western Jin Dynasty, the former Zhao Dynasty, the former Qin Dynasty, the later Qin Dynasty, the Western Wei Dynasty and the Northern Zhou Dynasty.
At the beginning of the founding of the Sui Dynasty, the capital was still in Chang 'an Old Town, which was destroyed by war. So Emperor Wendi of Sui Dynasty abandoned the old Chang 'an City north of Longshouyuan and chose a new site south of Longshouyuan and southeast of Han Chang 'an City, and established a new city-Daxing City.
After the Tang Dynasty made Chang 'an its capital, Daxing City in Sui Dynasty was changed to Chang 'an City, and it was rebuilt and expanded.
Extended data
Xi's long-term geographical environment as the capital.
Xi City is located in Guanzhong Basin in the middle of Weihe River Basin, with east longitude 107.40 ~ 109.49 degrees and north latitude of 33.42 ~ 34.45 degrees, bordering Weihe River and Loess Plateau in the north and Qinling Mountains in the south.
The geological structure of Xi 'an is divided into two units: Qinling geosyncline fold belt and North China platform. About 654.38+0.3 billion years ago, during the Yanshan Movement, a large fault occurred across the northern foot of Qinling Mountains. Since the Neogene about 3 million years ago, the neotectonic movement in the Qinling geosyncline fold belt south of the great fault has been extremely active, and the mountains have fallen sharply from north to south, creating the Qinling Mountains.
At the same time, the Weihe fault depression, which belongs to the North China platform to the north of the great fault, continued to subside, and the Weihe plain was formed under the joint action of aeolian loess cover and Weihe alluvial.
Xi 'an has a dense river network with 54 rivers. Among them, Weihe River, Jinghe River and Shichuan River are transit rivers, and the rest rivers all originate from Qinling Mountains or the hills of Li Dongnan, and most of them flow through Weihe Plain from south to north and flow into Weihe River. The area of the Yellow River basin accounts for 98.46% of the total area of the city.
Xi 'an Plain belongs to warm temperate zone and semi-humid continental monsoon climate, with four distinct seasons: cold, warm, dry and wet. Winter is cold, windy, foggy and less rainy and snowy; Spring is warm, dry, windy and the climate is changeable; Summer is hot and rainy, drought is prominent, and there are many thunderstorms and strong winds; Autumn is cool, the temperature drops rapidly, and the autumn rain is obvious.
Baidu Encyclopedia -Xi (capital and sub-provincial city of Shaanxi Province)
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