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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.

Jiacha County is a county under the jurisdiction of Shannan City, Tibet Autonomous region. It is located in the south of Tibet Autonomous region, between longitude 92 °14 mi 93 °07 'east and latitude 28 °49 mi 29 °43' north. Lang County, Linzhi City in the east, Longzi County and Qusong County in the south, Sangri County in the west and Gongbujiangda County in Linzhi City in the north. Jiacha County is 102.2 km long from north to south and 88.2km wide from east to west, with a total area of 4646 square kilometers. Jiacha means "Chinese salt" in Tibetan. Jiacha is a place of frequent activities in the Tubo period, belonging to the Tabu area. Before 1951, Jiachazong and Lasui were set up respectively, which were under the jurisdiction of Tabu Gongbu. In 1959, Jiacha Zong and La Sui were merged into Jiacha County. Jiacha County has jurisdiction over 2 towns and 5 townships, with a total population of 21608 (2012). October 2018, Tibet
Travel Notes In Gyaca County
One Walnut, Two Tales
Hidden in the thousand-year-old walnut forest in the Yarlung Zangbo Grand Canyon, every thousand-year-old walnut tree here "blooms" like a huge mushro
The Hometown of Cordyceps - Primitive Forest of Ba Township
The virgin forest in Ba Township, Jiacha County is located in the northeast of Jiacha County, 52 kilometers away from the county seat, with an average