• Dallas
  • Huining County

Dallas (/ˈdæləs/) is the third largest city in Texas and the largest city in the Dallas–Fort Worth metroplex, the fourth-largest metropolitan area in the United States at 7.5 million people. It is the largest city in and seat of Dallas County with portions extending into Collin, Denton, Kaufman and Rockwall counties. With a 2020 census population of 1,304,379, it is the ninth most-populous city in the U.S. and the third-largest in Texas after Houston and San Antonio. Located in the North Texas region, the city of Dallas is the main core of the largest metropolitan area in the southern United States and the largest inland metropolitan area in the U.S. that lacks any navigable link to the sea.[a]

The cities of Dallas and nearby Fort Worth were initially developed due to the construction of major railroad lines through the area allowing access to cotton, cattle and later oil in North and East Texas. The construction of the Interstate Highway System reinforced Dallas's prominence as a transportation hub, with four major interstate highways converging in the city and a fifth interstate loop around it. Dallas then developed as a strong industrial and financial center and a major inland port, due to the convergence of major railroad lines, interstate highways and the construction of Dallas/Fort Worth International Airport, one of the largest and busiest airports in the world. In addition, Dallas has DART (Dallas Area Rapid Transit) with different colored train lines that transport throughout the Metroplex.

Dominant sectors of its diverse economy include defense, financial services, information technology, telecommunications, and transportation. The Dallas–Fort Worth metroplex hosts 23 Fortune 500 companies, the second most in Texas and fourth most in the United States, and 11 of those companies are located within Dallas city limits. Over 41 colleges and universities are located within its metropolitan area, which is the most of any metropolitan area in Texas. The city has a population from a myriad of ethnic and religious backgrounds and one of the largest LGBT communities in the U.S. WalletHub named Dallas the fifth most diverse city in the United States in 2018.

Huining County, which belongs to Baiyin City, Gansu Province, is located in the central part of Gansu Province, at the southern end of Baiyin City; the terrain is tilted from southeast to northwest, with undulating beams and ravines; it is a mid-temperate semi-arid climate with a total area of 6439 square kilometers. As of 2018, Huining County has 24 towns and 4 townships under its jurisdiction, with a resident population of 543900. Huining County is known as the "lock key of Qin long". As early as the Neolithic Age more than 5000 years ago, human beings lived and multiplied in the territory. Zuli County was set up in the third year of Emperor Yuanding of Han Dynasty (114BC), which has a history of more than 2100 years. In October of the 25th year of the people's Republic of China (1936), the three main forces of the Chinese Workers' and Peasants' Red Army successfully reunited in Huining, which was the turning point of the Chinese revolution. In 2018, Huining County realized the GDP (GDP).
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