• Tulsa
  • Tsingyün、Qingyuan

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.

Qingyuan, also known as "Fengcheng", is a prefecture-level city in Guangdong Province, located in the middle and upper reaches of the Beijiang River. As early as the Neolithic Age, ancestors thrived in this land and created a splendid prehistoric civilization. Qingyuan is located in the north-central part of Guangdong Province, bordering Shaoguan in the northeast, Zhaoqing in the southwest and Guangzhou and Foshan in the southeast. With a total area of 19200 square kilometers, it is the largest prefecture-level city in Guangdong Province, with jurisdiction over Qingcheng, Qingxin District 2 and Fogang, Yangshan, Liannan and Lianshan counties and two county-level cities in Yingde and Lianzhou, with a total registered population of about 4.1 million in 2018. Qingyuan is connected with the Pearl River Delta region with Guangzhou as the center. In history, the southern part of Qingyuan once belonged to the jurisdiction of Guangzhou for a long time. Qingyuan culture, like Guangfu cultural circle, has a deep relationship in history, geography and ethnic groups. Yes
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