San Antonio (/ˌsæn ænˈtoʊnioʊ/ SAN an-TOH-nee-oh; Spanish for "Saint Anthony"), officially the City of San Antonio, is a city in Texas, United States. The city is the seventh-most populous in the United States, the second-largest in the Southern United States, and the second-most populous in Texas. It is the 12th most-populous city in North America, with 1,434,625 residents in 2020.
Founded as a Spanish mission and colonial outpost in 1718, the city in 1731 became the first chartered civil settlement in what is now present-day Texas. The area was then part of the Spanish Empire. From 1821 to 1836, it was part of the Mexican Republic. It is the oldest municipality in Texas, having celebrated its 300th anniversary on May 1, 2018.
Wudu District, under the jurisdiction of Longnan City, Gansu Province, is located in the southeast of Gansu Province, the central part of Longnan City and the middle reaches of the Bailong River. Wudu began as a place name in the pre-Qin Dynasty, Wudu County in the Western Han Dynasty, Jiizhou in the Tang Dynasty, Wudu County in the Republic of China, and the county was withdrawn in 2004. Wudu District is the political, economic, cultural, transportation center and military center of Longnan, and one of the regional central cities in the southeast of Longnan. It has jurisdiction over 4 subdistrict offices, 26 towns, 8 townships, 2 ethnic townships, 50 communities and 649 villages, covering an area of 4683 square kilometers; the total population is 602829, the resident population is 568100, and the urbanization rate is 40.56% (2017). Wudu District is located in the junction of Qin and Ba Mountains, known as "Ba Shu throat, Qin long lock key". It is the friend of Gansu, Shaanxi and Sichuan provinces.