• Tulsa
  • Jian'an District

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.

Jian'an District is the municipal district of Xuchang City, Henan Province, which is located in the middle of Xuchang City, Henan Province, surrounded by Weidu District of Xuchang City, Mianling County to the east, Yuzhou City to the west, Linying County to the south and Changge City to the north. The geographical coordinates are 113 °35 °east longitude 114 °04 'and 33 °52 °34 °10' north latitude. Jian'an District has a total area of 1090 square kilometers. in 2015, the total output value of Jian'an District was 24.306 billion yuan, an increase of 9.6% over the same period in 2015. In 2017, Jian'an District has jurisdiction over 16 township offices with a total population of 1.3076 million. Jian'an District is the national advanced area of scientific and technological progress, the first batch of key areas of opening up to the outside world, the advanced area of developing export-oriented economy, the national important processing and export base of hair products, and the production base of automobile transmission shaft. Jian'an District was selected in 2018.
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