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.
Shanwei City is located on the southeast coast of Guangdong Province, bordering Jieyang City to the east, Huilai County to the east, Huizhou City to the west, Huidong County to the west, Heyuan City to the north, Zijin County to the north, and the South China Sea to the south. The total area is 5271 square kilometers. It has jurisdiction over 1 city, 2 counties and 3 districts, such as urban area, Haifeng County, Lufeng City, Luhe County, Honghai Bay Economic Development Experimental Zone and overseas Chinese Management Zone, with a total population of more than 3.3 million. There are 93 islands, 12 ports and 3 sea lakes in the sea area of Shanwei City. Shanwei Port is a natural deep-water port and the first-class coastal open port in the country. The inland topography of the area is dominated by mountains and hills, and there are many plains and hills along the coast. Hai Lufeng Revolutionary Base is one of the 13 revolutionary base areas in China. Shanwei is the meeting place of Chaoshan culture, Minnan culture, Guangfu culture and Hakka culture.