province in the People's Republic of China .

As one of the oldest cities in Chinese history,Xi'an is one of the Four Great Ancient Capitals of China because it has been the capital of some of the most important dynasties in Chinese history,including the Zhou,Qin,Han,the Sui,and Tang dynasties.Xi'an is the easternendof the Silk Road .The city has more than 3,100 years ofhistory,and was known as Chang'an (traditional Chinese:长安).