Xi'an, abbreviated as "Hao" and known as Chang'an and Haojing in ancient times, is the capital of Shaanxi Province, a sub-provincial city, a megacity, a core city of the Guanzhong Plain Urban Agglomeration, an important central city in western China as approved by the State Council, and an important national base for scientific research, education and industry. As of 2019, the city has 11 districts and 2 counties under its jurisdiction, with a total area of 10,752 square kilometers, a built-up area of 700.69 square kilometers, a resident population of 10,203,500 people, an urban population of 7,612,800 people, and an urbanization rate of 74.61%.