• Tulsa
  • Daye 

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.

Daye, a county-level city under the jurisdiction of Hubei Province, administered by Huangshi City, is located in the southeast of Hubei Province, the south bank of the middle and lower reaches of the Yangtze River, the hinterland of Hubei "Metallurgical Corridor", an important part of Wuhan city circle, with a total area of 1566.3 square kilometers. Daye is the birthplace of Chinese bronze culture. More than 3000 years ago, Chinese ancestors mined and smelted copper in Daye, creating a bronze civilization. The Tonglushan ancient copper mine site in the territory is known as "the ninth wonder of the world". It has been listed in the National Archaeological site Park project and the preliminary list of "World Cultural Heritage", and has been awarded the Guinness record of "Ancient Copper Mine with the longest continuous Mining time". Tonglushan Sifangtang site was selected as one of the Top Ten Archaeological discoveries in China in 2015. As of
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