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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.

Guyuan, a prefecture-level city under the jurisdiction of Ningxia Hui Autonomous region, known as Dayuan, Gaoping, Xiaoguan and Yuanzhou in ancient times, is located in the south of Ningxia Hui Autonomous region, is a deputy central city of Ningxia Hui Autonomous region, and is located on the northwest edge of China's Loess Plateau. It is a typical continental climate; it has jurisdiction over 1 district and 4 counties, with a total area of 10540 square kilometers; by the end of 2018, the total number of permanent households in Guyuan is 352000, the total resident population is 1.2424 million, and the total registered population is 1.5077 million. Guyuan is located in the center of the triangle composed of the three provincial capitals of Xi'an, Lanzhou and Yinchuan, one of the five prefecture-level cities of Ningxia and the only non-Yellow River city. Shaanxi-Gansu-Ningxia Revolutionary Base Revitalization Planning Central City, South Ningxia Regional Central City, political, Economic, Cultural Center and Transportation Hub
Travel Notes In Gu Yuan
Summer Vacation Tour to Northwest - Ningxia Guyuan
As a person from the south of the Yangtze River, I seldom have the opportunity to go to the Northwest to see the great rivers and mountains of our mot
The flowers are blooming just right, and the mountain flowers in Xiji Huoshizhai are gradually blooming!
How dare peach blossoms compare with Danxia? Although the flowering period is only about ten days long, the beauty of Danxia landform has experienced
A three-day boutique tour of the northern line, taking you to Guyuan, Ningxia
The summer is hot, the south enters the steamer mode, and the north enters the grilling stage It’s better to go to Guyuan, where there are green hill