Why do so many dynasties have their capitals in Xi'an?

Geographical situation factors. First of all, Xi'an is located in the middle of the 800-mile Guanzhong Plain, bordering the Qinling Mountains to the south and the Weishui River to the north. The Guanzhong Plain where it is located is located in the geographical center of my country and has convenient transportation. The climate is mild, it rains all year round, and the land is fertile.

Geographic location factors. Xi'an is a famous place among the six ancient capitals. It is close to the main route into the Central Plains from minority areas and is easy to defend and block. Xi'an borders Tongguan to the east, Sanguan to the west, Xiaoguan to the north, and Wuguan to the south. These natural passes are like a natural barrier protecting Xi'an, making them a place that is easy to defend but difficult to attack.

Traditional factors in building the capital. Xi'an has been managed by many dynasties, and its urban defense and economic foundation are also very superior. It made successive dynasties willing to build their capitals here.