Definition of Xian: Xian is a city in central China. Xian is the largest and most developed city in the central to northwestern part of China and is ranked among the 10 largest cities in China.
Xi'an, is the capital of Shaanxi province in China and a sub-provincial city. Known as one of the most important cities in Chinese history, Xi'an is listed as one of the Four Great Ancient Capitals of China because it has been the capital of 13 dynasties, including the Zhou, Qin, Han, and Tang. Xi'an is also the eastern end of the Silk Road. The city has more than 3,100 years of history.