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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.

Wudalianchi Scenic spot (The Wudalianchi Scenic Area): national AAAAA Scenic spot, World Geopark, World Man and Biosphere Reserve, International Green list, National key Scenic spot, National Nature Reserve, National Forest Park, National Natural Heritage, hometown of Mineral Water in China, hometown of famous volcanoes in China, National Intangible Cultural Heritage of Holy Water Festival (Medicine Spring Club). Wudalianchi Scenic spot is located in Wudalianchi City, Heihe City, Heilongjiang Province, 18 kilometers away from Wudalianchi City, and is located in the transition zone from Xiaoxinganling Mountain to Songnen Plain, with a total area of 1060 square kilometers, including 321000 mu of woodland, 57300 mu of grassland and 150000 mu of wetland. Between 1719 and 1721, fire
Airport In The Wudalianchi Scenic Area - Heihe Aihui Airport
Heihe Aihui Airport (Heihe Aihui Airport, IATA: HEK, ICAO: ZYHE), located in the camp of the third team of New Life, Airport Road, Aihui District, Heihe City, Heilongjiang Province, China, 15 kilometers away from Heihe city center in the northeast, is a 4C-level China Domestic Regional Airport   .
In 1933, Heihe Airport began to implement military and civilian use; on September 30, 2001, Heihe Airport resumed operations   ; In 2003, the new terminal of Heihe Airport was opened   ; In March 2016, Heihe Airport officially changed its name to Heihe Aihui Airport   .
As of August 2020, the terminal building of Heihe Aigun Airport covers an area of ​​5,800 square meters, with 1 boarding gate; 4 C-class aircraft seats on the civil aviation platform; the runway is 2,500 meters long and 45 meters wide; it can meet the annual passenger Throughput of 113,200 person-time usage requirements       .
In 2019, Heihe Aihui Airport handled a total of 215,947 passengers, a year-on-year increase of 19.4%, ranking 187th in the country; cargo and mail throughput was 35.8 tons, a year-on-year decrease of 26.8%, ranking 201st in the country; aircraft took off and landed 2,730 sorties , down 11.4% year-on-year, ranking 197th in the country   .
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