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.
Jurong is a county-level city administered by Zhenjiang City, Jiangsu Province, which is located in the south of Jiangsu Province, connecting Zhenjiang to the east and Nanjing to the west. It is the southeast gateway of Nanjing and a county-level city in Nanjing metropolitan area. It is known as "Nanjing New Eastern suburb and Jinling Imperial Garden". It is a new city in the Yangtze River Delta integrating port, industry, trade and tourism. Jurong bought a county in the first year of Yuanshuo of the Western Han Dynasty (128 BC). It has a history of more than 2000 years. It is one of the 13 ancient civilized counties that were first established in Jiangsu Province, and has long been under the jurisdiction of Nanjing. In April 1995, it was approved by the State Council to withdraw counties and set up cities, which became one of the earliest open areas announced by the State Council. Jurong is one of the top 100 counties (cities) in China, an excellent tourist city, a national ecological demonstration zone, a national advanced city in science and technology, a national health city, and a national.