• Tulsa
  • TongLing

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.

Tongling, a prefecture-level city in Anhui Province, is located in the south-central part of Anhui Province and the lower reaches of the Yangtze River, with Hefei to the north, Chizhou to the south, Wuhu to the east and Anqing to the west, with a total area of 3008 square kilometers. Tongling gets its name from copper and flourishes with copper. it is known as "the ancient copper capital of China and the contemporary copper base". The history of copper mining began in the Shang and Zhou dynasties, flourished in the Han and Tang dynasties, and lasted for more than 3500 years. The first furnace of copper water and the first copper ingot in New China came from Tongling. The first copper industrial base was built in Tongling, and the first copper stock was issued in Tongling. In 2018, Tongling had jurisdiction over three municipal districts and one county, with a resident population of 1.629 million, achieving a GDP of 122.24 billion yuan, of which
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