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.
Tongxin County is located in the central and southern part of Ningxia Hui Autonomous region, under the jurisdiction of Wuzhong City. It is bordered by Yanchi County in the east and Huanxian County in Qingyang City, Gansu Province in the east, Yuanzhou District in Guyuan City in the south, Shapotou District, Zhongning County and Haiyuan County in Zhongwei City in the west, and Hongsibao District in Wuzhong City in the north. It is located on the Loess Plateau in the south of Ordos platform and is high in the south and low in the north. There are mainly five types of landforms, such as mountains, loess hills, river valleys and desert lands, with complex topography and crisscross distribution of mountains and rivers. There are Luoshan, Miboshan, Madashan, Laoye Mountain, Qinglong Mountain, Yaoshan and so on, all of which belong to Liupanshan system. In March 2019, it was listed as the first batch of revolutionary cultural relics protection and utilization district and county list.