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.
Hanchuan City, Xiaogan City, Hubei Province, in charge of county-level cities, is located in central Hubei Province, the hinterland of Jianghan Plain, the lower reaches of Hanjiang River, close to Wuhan, the central city of Central China, which is an important part of Wuhan city circle. Wuhan City Circle Expressway (Wuhan sixth Ring Road), Hu-Rong Expressway (G42), Shanghai-Chongqing Expressway (G50), G348 National Highway, Handan Railway and Hanyi High-speed Railway pass through. Hanchuan City has jurisdiction over 2 streets, 14 towns, 6 townships and 4 farming farms, covering an area of 1663 square kilometers, with a population of 1.13 million people, with an urban built-up area of 30 square kilometers and an urban population of 300000. Hanchuan set up the county in the Northern and Southern dynasties, because of the largest tributary of the Yangtze River.