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.
Baiyin, prefecture-level city of Gansu Province. Located in the middle of Gansu Province, located in the transitional zone between the Loess Plateau and Tengger Desert, most of the territory is mountainous, mountainous and wide valley plain coexist; it is the transition zone from mid-temperate semi-arid zone to arid zone. The city has a total area of 21158.7 square kilometers and has jurisdiction over 2 districts and 3 counties. By the end of 2018, Baiyin had a resident population of 1.7342 million, an increase of 4900 over the end of last year. Baiyin City is located in the upper reaches of the Yellow River and the middle of Gansu Province, located in the confluence zone of the ancient Silk Road and the Yellow River, connecting the desert to the north, Qinghai and Tibet to the south, the Central Plains to the east and the western region to the west, 69 kilometers away from the provincial capital Lanzhou and 46 kilometers away from Zhongchuan Airport. It is a strategic channel connecting the subcontinental bridge, a transportation corridor and an energy logistics channel to countries along the Silk Road. The territory of Baiyin