• Houston
  • Ulan County

Houston (/ˈhjuːstən/ (listen); HEW-stən) is the most populous city in Texas, the most populous city in the Southern United States, the fourth-most populous city in the United States, and the sixth-most populous city in North America, with a population of 2,304,580 in 2020. Located in Southeast Texas near Galveston Bay and the Gulf of Mexico, it is the seat and largest city of Harris County and the principal city of the Greater Houston metropolitan area, which is the fifth-most populous metropolitan statistical area in the United States and the second-most populous in Texas after Dallas–Fort Worth. Houston is the southeast anchor of the greater megaregion known as the Texas Triangle.

Comprising a land area of 640.4 square miles (1,659 km2), Houston is the ninth-most expansive city in the United States (including consolidated city-counties). It is the largest city in the United States by total area whose government is not consolidated with a county, parish, or borough. Though primarily in Harris County, small portions of the city extend into Fort Bend, and Montgomery counties, bordering other principal communities of Greater Houston such as Sugar Land and The Woodlands.

The city of Houston was founded by land investors on August 30, 1836, at the confluence of Buffalo Bayou and White Oak Bayou (a point now known as Allen's Landing) and incorporated as a city on June 5, 1837. The city is named after former General Sam Houston, who was president of the Republic of Texas and had won Texas's independence from Mexico at the Battle of San Jacinto 25 miles (40 km) east of Allen's Landing. After briefly serving as the capital of the Texas Republic in the late 1830s, Houston grew steadily into a regional trading center for the remainder of the 19th century.

Wulan County, which belongs to Haixi Mongolian-Tibetan Autonomous Prefecture of Qinghai Province, is located in the central part of Qinghai Province, Haixi Mongolian-Tibetan Autonomous Prefecture and the eastern part of Qaidam Basin, with Gonghe County of Hainan Tibetan Autonomous Prefecture in the east, Dulan County in the south, Delingha City in the west and Tianjun County in the north. The geographical coordinates are 97 °01 "99 °27" east and 36 °19 "37 °20" north. The county is 216.9 km long from east to west and 112km wide from north to south. The total land area of the county is 12858.16 square kilometers. As of 2010, Wulan County has jurisdiction over 4 towns, a total of 38 village (pastoral) committees, with a total population of 36555, including Han, Mongolian, Tibetan, Hui, Tu, Salar and other 17 ethnic groups. In 2010, Wulan County completed its gross domestic product (GDP).
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