Xi'an,used to be called Chang'an,it is one of the world famous Four Civilized Capitals,headed in Chinese old capitals.As a capital,it lasted the longest ,to be capital of the most dynastys,has the biggest affection,it is the cradle of Chinese nation,the source of Chinese civilization and the representative of Chinese culture. Xi'an,used to be called Chang'an,it is one of the world famous Four Civilized Capitals,headed in Chinese old capitals.As a capital,it lasted the longest ,to be capital of the most dynastys,has the biggest affection,it is the cradle of Chinese nation,the source of Chinese civilization and the representative of Chinese culture.