Xi'an (ancient name: Chang'an), capital of Shaanxi Province and a sub-provincial city, is located in the Guanzhong Plain, backed by the Qinling Mountains and bordered by the Wei River. Covering about 10,097 square kilometers, it had a permanent population of 13.1676 million by 2024. As the starting point of the ancient Silk Road and a cradle of Chinese civilization, it has over 3,100 years of city history and 1,100 years as a capital (for 13 dynasties), one of the Four Great Ancient Capitals of the World. Boasting world cultural heritages like the Terracotta Army, it is also the core node city of the Silk Road Economic Belt and the largest central city in Northwest China, inheriting the millennium-old civilization of the Silk Road.