• Tulsa
  • Changwu  County

Tulsa (/ˈtʌlsə/) is the second-largest city in the state of Oklahoma and 47th-most populous city in the United States. The population was 413,066 as of the 2020 census. It is the principal municipality of the Tulsa Metropolitan Area, a region with 1,023,988 residents. The city serves as the county seat of Tulsa County, the most densely populated county in Oklahoma, with urban development extending into Osage, Rogers, and Wagoner counties.

Tulsa was settled between 1828 and 1836 by the Lochapoka Band of Creek Native American tribe and most of Tulsa is still part of the territory of the Muscogee (Creek) Nation.[a]

Historically, a robust energy sector fueled Tulsa's economy; however, today the city has diversified and leading sectors include finance, aviation, telecommunications and technology. Two institutions of higher education within the city have sports teams at the NCAA Division I level: Oral Roberts University and the University of Tulsa. As well, the University of Oklahoma has a secondary campus at the Tulsa Schusterman Center, and Oklahoma State University has a secondary campus located in downtown Tulsa. For most of the 20th century, the city held the nickname "Oil Capital of the World" and played a major role as one of the most important hubs for the American oil industry.

Changwu County, which belongs to Xianyang City, Shaanxi Province, is located in the west of Guanzhong and on the south side of the middle reaches of Jinghe River in the northwest of Xianyang City. It is adjacent to Bin County in the east, Lingtai County in Gansu Province to the south, Jingchuan County in Gansu Province to the west, and Ningxian County and Zhengning County in Gansu Province to the north. Between longitude 107 °38 "49"-107 °58 "02" east and latitude 34 °59 °09 "- 35 °18" 37 "north. The longest point from north to south is 30.06km, and the widest from east to west is 27.23km, with a total area of 567.1 square kilometers. In 2018, Changwu County has jurisdiction over 1 street and 7 towns. At the end of 2016, the resident population of Changwu County was 170878, with a regional gross domestic product (GDP) of 7.2999 billion yuan, of which the added value of the primary industry was 15.86.
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