Xi is a metropolis with a long history. Xi 'an, formerly known as Chang 'an and Jingzhao, is the capital and sub-provincial city of Shaanxi Province, the largest city in northwest China, a national regional central city of China, an important national scientific research, education and industrial base, a political, economic, cultural and scientific education center of Shaanxi Province, a world famous historical and cultural city, an Asian knowledge and technological innovation center and an important manufacturing base of China. The city has jurisdiction over nine municipal districts, namely Xincheng, Beilin, Lianhu, Yanta, Weiyang, Baqiao, Yanliang, Lintong and Chang 'an, and four counties, namely Zhouzhi, Lantian, Huxian and Gaoling. Street, township 176, including 89 street offices, 40 towns and 47 townships.