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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.

Hekou District, Dongying City area, located in the north of Shandong Province, north of the Yellow River estuary, is a typical Yellow River Delta geomorphology, high in the south and low in the north, high in the west and low in the east, with a warm temperate monsoon continental climate; it has jurisdiction over 2 streets and 4 towns with a total area of 2267.44 square kilometers and a registered household population of 220258 in 2017. Most of the estuarine areas are retreated to the sea. At the beginning of the Ming Dynasty, from the ocean shop of the Tu Hai River in the ancient river, and from the Daqing River in Jishui to the north of Tiemenguan in Lijin, it extended to the formation of territory and land. From time to time, salt people, fishermen and waterway merchants from other places flow back and forth. Residents began to appear in the decade of Daoguang of the Qing Dynasty (1830). The Qing Dynasty belongs to Zhongxin Township, Zhanhua County, Wuding Prefecture and Yonghe Township, Lijin County. In 2017, the gross domestic product (GDP) of the estuary reached 291.
Airport In Hekou District - Dongying Shengli Airport
Dongying Shengli Airport (Dongying Shengli Airport, IATA: DOY, ICAO: ZSDY), located in Shangfei Avenue, Yongan Town, Kenli District, Dongying City, Shandong Province, China, is 12.5 kilometers away from Dongying Municipal People's Government and Laizhou Bay. It is a 4D-level domestic airport. Regional Airport, COMAC Dongying Civil Aircraft Test Flight Base   .
On November 28, 2001, Dongying Yongan Airport officially resumed flights; on January 15, 2011, Dongying Yongan Airport was renamed Dongying Shengli Airport   ; On February 1, 2018, the 3600-meter runway of Dongying Shengli Airport was opened   .
As of January 2022, the terminal building of Dongying Shengli Airport has an area of ​​25,400 square meters, with 4 boarding bridges; there are 7 aircraft seats on the civil aviation platform, including 6 class C seats and 1 class D seat ;The length of the runway is 3,600 meters and the width is 45 meters; it can meet the needs of annual passenger throughput of 1 million passengers and cargo throughput of 5,000 tons   [twenty one]    .
In 2021, Dongying Shengli Airport will handle a total of 682,129 passengers, a year-on-year increase of 49.8%, ranking 112th in the country; cargo and mail throughput will be 705.2 tons, a year-on-year increase of 8.7%, ranking 134th in the country; aircraft movements will be 31,569 , a year-on-year decrease of 21.15%, ranking 73rd in the country   .
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