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.
Huanning County, a subordinate county of Yuxi City, Yunnan Province, is located on the southern edge of the lake basin area of the central Yunnan plateau and belongs to the Zhongshan type landform. It is bordered by Maile County in the east, Jianshui County in the south, Tonghai County and Jiangchuan County in the west, Chengjiang County and Yiliang County in the north. The territory is 34 km wide from east to west, 59 km from north to south, with a total area of 1313 square kilometers, with a mountain area of 89%. It is located between 23 °59'N and 24 °34 °N and 102 °49'E to 103 °09'E. the terrain is high in the northwest, low in the southeast, narrow in east and west, long in the north and south, undulating mountains and mountains, hills, basins and valleys interlaced with "two ridges and two grooves". The larger basins are Ningzhou Dam and Panxi Dam. The main rivers are Nanpan River, Qinglong River, Haikou River, Longdong River and Huaxi River, all of which belong to the Pearl River system.