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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.

Qionghai, a county-level city in Hainan Province, is located in longitude 110 °7'5 "~ 40 °50 °quot; latitude 18 °58 °50 °quot; north latitude 18 °58 °35 °quot; It is located in the east of Hainan Province, the middle and lower reaches of Wanquan River, 78 kilometers north of Haikou City, 60 kilometers south of Wanning City, 163 kilometers of Sanya City, Dingan County and Tunchang County in the west, and Qinglan Port in Wenchang to the east. Qionghai has a total area of 1710 square kilometers. in 2016, Qionghai had a resident population of 506100, and about 550000 overseas Chinese, Chinese, and compatriots from Hong Kong, Macao and Taiwan, distributed in 28 countries and regions on five continents. The city has jurisdiction over 12 towns and the Bincun Mountain overseas Chinese Economic Zone, which also has three state-owned farms and one state-owned forest farm. In 2017, Qiong Haisheng
Airport In Qionghai City - Qionghai Boao Airport
Qionghai Boao Airport (Qionghai Boao Airport, IATA: BAR, ICAO: ZJQH), located in Zhongyuan Town, Qionghai City, Hainan Province, China, 12 kilometers away from Qionghai City, 15 kilometers away from Boao International Conference Center, the flight area level is 4C level is a key supporting project of the Boao Forum for Asia.  
Qionghai Boao Airport was officially opened to navigation on March 17, 2016, and was named Qionghai Boao Airport. In April 2016, the airport launched the second-phase expansion project; in March 2017, the second-phase expansion project of the airport was completed and accepted.  
According to the information on the airport's official website in January 2019, Qionghai Boao Airport has two terminals, China's domestic (9900 square meters) international and Hong Kong, Macao and Taiwan (6848 square meters), with a 3200-meter runway and 52 aircraft seats. The aircraft used are Boeing B737-800 and Airbus A320.    
In 2020, the passenger throughput of Qionghai Boao Airport was 562,900 passengers, a year-on-year increase of 0.7%; the cargo and mail throughput was 552.6 tons, a year-on-year increase of 3.6%; bit, 137th, 109th.  
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