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.
Shuangta District, which belongs to Chaoyang City, Liaoning Province, is located in Chaoyang City in the west of Liaoning Province. It is located in the east of Nuluerhu Mountains and the western foot of Songling Mountains. It is a long pan in the Daling River Valley. It is the political, economic and cultural center of Chaoyang. It gets its name from the well-preserved North Pagoda of the Northern Wei Dynasty and the Southern Tower of the Tang Dynasty. Shuangta District is connected with the urban agglomeration in central Liaoning and the Liaodong Peninsula in the east, the Beijing-Tianjin-Hebei metropolitan area in the west, the Bohai Sea in the south and the hinterland of Inner Mongolia in the north. The center of geographical coordinates is 120 °27km east longitude and 41 °35 'north latitude. In 2015, Shuangta District has a total area of 500square kilometers and has jurisdiction over 4 townships (towns) and 11 streets with a total population of 404500. In 2015, the GDP of the whole region reached 13.33061 billion yuan.