• Tulsa
  • Jiange 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.

Jiange County, which belongs to Guangyuan City, Sichuan Province, is located at the northern edge of Sichuan Basin, the junction of Sichuan, Shaanxi and Gansu provinces, located in the north of Sichuan Province and the southwest of Guangyuan City, guarding the natural danger of Jianmen. "Jiange is towering and towering into the clouds, as long as it is guarded by one person, thousands of troops are difficult to capture." it is known as "the Golden Triangle of Northern Sichuan" and "the Pearl of Shu Road". The county covers an area of 3204 square kilometers and has jurisdiction over 27 towns and 30 townships, with a total registered population of 657700 at the end of 2017. Dangde County was first established at the end of the Eastern Han Dynasty, and Nanan County was set up in Pu'an Town in the Northern and Southern dynasties during the Liu Song Dynasty. After the reform, Jianzhou was changed to Jiange County in 1913, and the county seat moved to Xiasi Town in September 2003. The work of withdrawing counties and building cities was officially launched in April 2015, and it is planned to complete the declaration of Jianmenguan City at the county level in 2017. Beijing and Kunming
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