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Indianapolis (/ˌɪndiəˈnæpəlɪs/), colloquially known as Indy, is the state capital and most populous city of the U.S. state of Indiana and the seat of Marion County. According to the U.S. Census Bureau, the consolidated population of Indianapolis and Marion County was 977,203 in 2020. The "balance" population, which excludes semi-autonomous municipalities in Marion County, was 887,642. It is the 15th most populous city in the U.S., the third-most populous city in the Midwest, after Chicago and Columbus, Ohio, and the fourth-most populous state capital after Phoenix, Arizona, Austin, Texas, and Columbus. The Indianapolis metropolitan area is the 33rd most populous metropolitan statistical area in the U.S., with 2,111,040 residents. Its combined statistical area ranks 28th, with a population of 2,431,361. Indianapolis covers 368 square miles (950 km2), making it the 18th largest city by land area in the U.S.

Indigenous peoples inhabited the area dating to as early as 10,000 BC. In 1818, the Lenape relinquished their tribal lands in the Treaty of St. Mary's. In 1821, Indianapolis was founded as a planned city for the new seat of Indiana's state government. The city was platted by Alexander Ralston and Elias Pym Fordham on a 1-square-mile (2.6 km2) grid next to the White River. Completion of the National and Michigan roads and arrival of rail later solidified the city's position as a manufacturing and transportation hub. Two of the city's nicknames reflect its historical ties to transportation—the "Crossroads of America" and "Railroad City". Since the 1970 city-county consolidation, known as Unigov, local government administration operates under the direction of an elected 25-member city-county council headed by the mayor.

Indianapolis anchors the 29th largest economic region in the U.S., based primarily on the industries of trade, transportation, and utilities; professional and business services; education and health services; government; leisure and hospitality; and manufacturing. The city has notable niche markets in amateur sports and auto racing. The city is home to three Fortune 500 companies, two major league sports clubs (Colts and Pacers), five university campuses, and several museums, including the world's largest children's museum. However, the city is perhaps best known for annually hosting the world's largest single-day sporting event, the Indianapolis 500. Among the city's historic sites and districts, Indianapolis is home to the largest collection of monuments dedicated to veterans and war casualties in the U.S. outside of Washington, D.C.

Tong Dong Autonomous County is located at the southernmost tip of Huaihua City, Hunan Province, at the junction of Hunan, Guangxi and Guizhou provinces (regions). It is the main road leading to the southwest of China. Located in the transitional zone from the eastern edge of the Yunnan-Guizhou Plateau to the Nanling Mountains, Xuefeng Mountain extends to the southwest, belonging to the Yangtze River and Pearl River systems. It is bordered by Suining County and Chengbu Miao Autonomous County in Hunan Province to the east, Miao and Dong Autonomous County in Jingzhou to the north, Sanjiang Dong Autonomous County and Longsheng County in Guangxi Zhuang Autonomous region to the south, and Liping County in Guizhou Province to the west. Historically, Tongdao County is the corridor zone between Chu and Yue, which is known as "South Chu Polar region" and "Baiyue flap throat". The territory is 58 kilometers wide from east to west and 68 kilometers from north to south, with a total area of 2239 square kilometers, accounting for 1.4 percent of the total area of the province. There are mainly 14 fraternal ethnic groups, mainly Dong, Han, Miao and Yao.
Airport In Tongdao - Huaihua Zhijiang Airport
Huaihua Zhijiang Airport (Huaihua Zhijiang Airport, IATA: HJJ, ICAO: ZGCJ), referred to as "Zhijiang Airport", is located in the eastern suburb of Zhijiang Dong Autonomous County, Huaihua City, Hunan Province, 31 kilometers northeast of Huaihua City, northwest of Zhijiang Jiang Station is 5 kilometers away. It is a 4C-level military-civilian joint feeder airport. The predecessor of the airport "Zhijiang Airport" is known as "the second largest strategic airport in the Far East".     .
In October 1938, Zhijiang Airport was completed and opened to navigation   ; In January 2003, Huaihua Zhijiang Airport officially started construction; on December 19, 2005, Huaihua Zhijiang Airport officially opened to navigation; on March 30, 2017, the runway of Huaihua Zhijiang Airport was extended to 2600 meters   .
As of February 2021, the temporary terminal of Huaihua Zhijiang Airport has an area of ​​2,000 square meters, and the area of ​​the civil aviation station is 27,065 square meters. There are 3 C-class seats and 1 B-class seat; the runway is 2,600 meters long, 45 meters; can guarantee the use demand of 400,000 passenger throughput and 9,600 tons of cargo and mail throughput in 2020     .
In 2021, Huaihua Zhijiang Airport will complete an annual passenger throughput of 349,195 passengers, a year-on-year decrease of 9.6%, ranking 157th in the country; cargo and mail throughput of 7.6 tons, a year-on-year decrease of 36.8%, ranking 215th in the country; aircraft movements of 32,886 sorties, a year-on-year increase of 47.6%, ranking 71st in the country   .
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