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San Diego (/ˌsæn diˈeɪɡoʊ/ SAN dee-AY-goh, Spanish: [san ˈdjeɣo]; Spanish for 'Saint Didacus') is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States and the seat of San Diego County, the fifth most populous county in the United States, with 3,338,330 estimated residents as of 2019. The city is known for its mild year-round climate, natural deep-water harbor, extensive beaches and parks, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center. San Diego is the second largest city in the state of California, after Los Angeles.

Changqing District, Changqing District, which belongs to Jinan City, Shandong Province, is one of the municipal districts of Jinan City, the capital of Shandong Province, and is located in the west of Jinan City. It is adjacent to Shizhong District of Jinan City, Huaiyin District of Jinan City and Licheng District of Jinan City in the east, Pingyin County and Feicheng City in the west, Qihe County in the north and Daiyue District and Feicheng City in the south. The total area of the region is 1209 square kilometers; it has jurisdiction over 7 streets, 3 towns and 613 administrative villages. On June 26, 2001, Changqing County was abolished and Changqing District of Jinan was established. In 2018, the regional GDP was 36.69 billion yuan, up 9.2%; the total retail sales of consumer goods was 16.5 billion yuan, up 9.0%; and the general public budget revenue was 2.35 billion yuan, up 15.6%.
Airport In Changqing District - Jinan Yaoqiang International Airport
Jinan Yaoqiang International Airport (Jinan Yaoqiang International Airport, IATA: TNA, ICAO: ZSJN), located at the junction of Licheng District and Zhangqiu District, Jinan City, Shandong Province, China, 30 kilometers away from the city center, is a 4E-class civil international airport. One of the important entry gateways and arterial airports.  
Jinan Yaoqiang International Airport was completed and opened to navigation on July 26, 1992. The expansion project of the flight area was completed in October 2000; the expansion project of the terminal area was completed in March 2005; and the south concourse project of the terminal building was started in 2010.  
According to information on the airport's official website in September 2017, Jinan Yaoqiang International Airport covers an area of ​​7,200 acres, with a total terminal building area of ​​114,000 square meters, of which the south corridor covers an area of ​​30,000 square meters, which can guarantee an annual passenger throughput of 12 million , 4,500 passengers at peak hours, and 100,000 aircraft takeoffs and landings; the apron is 440,000 square meters in total, with 24 boarding bridges.   As of the end of 2016, the airport has more than 140 air routes.  
In 2018, the passenger throughput of Jinan Yaoqiang International Airport reached 16.612 million, a year-on-year increase of 16%   . On the morning of August 27, 2022, the Jinan Yaoqiang Airport Phase II Reconstruction and Expansion Project Construction Promotion Meeting was held at Yaoqiang International Airport.  
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