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.
Huzhu Tu Autonomous County is a county under the jurisdiction of Haidong City, Qinghai Province. it is located in the east of Qinghai Province and north of Haidong City, relying on the Daban Mountains of Qilian Mountains in the north, adjacent to Menyuan Hui Autonomous County of Haibei Prefecture in the northeast, adjacent to Tianzhu Tibetan Autonomous County and Yongdeng County in Gansu Province in the northeast, Ledu District of the municipal government in the southeast, bounded by Huangshui in the south, facing Pingan District in the south, Datong County in Xining City in the west, and the provincial capital Xining City in the southwest. The county is about 64 kilometers from north to south and 86 kilometers from east to west, with a total area of 3423.9 square kilometers. There are no lakes in the county, there are 8 large and small natural rivers, all of which belong to the Yellow River basin and Huangshui water system, with a total length of 2895 kilometers. The bluestone of the Daban Mountains runs through the whole territory from northwest to southeast, dividing the whole county into two major topographic units. Huzhu Tu Autonomous County has jurisdiction over 8 towns and 9 townships.