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.
Xinhe County is under the jurisdiction of Xingtai City, Hebei Province, which is located in the south of Hebei Province and the north of Xingtai City. The administrative area covers an area of 366 square kilometers and has a resident population of 174300 (2016). It has jurisdiction over 2 towns, 4 townships and 169 administrative villages. The county people's government is stationed in the eastern section of Guangming Road, Xinhe Town. The ownership of the new river has been changed many times in previous dynasties, but it is not often abandoned. Tangyang County was bought in the early Western Han Dynasty, and it was called Xinhe County in the fourth year of Huangyou in the Northern Song Dynasty (AD 1052). People with lofty ideals emerged in history, such as Tian Guang, a virgin of the State of Yan, Hou Gengchun of Dongguang of the Eastern Han Dynasty, Yan Liang, a famous general of the three Kingdoms, Song Dengchun, a poet of the Ming Dynasty, and Dong Zhentang, a senior general of the Red Army. There are Tuotuo Tomb, Liu Gongdi, Ciming Temple and other historical sites in the territory. It is listed as the first batch of millennium ancient counties in Hebei Province. Xinhe County is located in the Fuyang River alluvial plain, the terrain is flat, with an average elevation of 25 meters.