Xian, traditionally called Changan, is the provincial capital of Shaanxi in China. Xian is one of four world ancient capitals (the other three are Athens, Roma and Cairo). As the 13-dynasty capital for more than1100 years from the 11th century BC to the 10th century AD, Xian was the national center of China's politics, economy and culture. Xian is one of 15 assistant provincial-level cities in China and one of core cities of 9 regions in China. ...