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.
Seda County is a county under the jurisdiction of Ganzi Tibetan Autonomous Prefecture in Sichuan Province. It is located in the northeast of Ganzi Prefecture, latitude 31 °38 mi 33 °20 N, longitude 98 °48 mi 101 °00'E. It is located at the intersection of Sichuan Province, Qinghai Province, Aba Prefecture, Ganzi Prefecture and Guoluo Prefecture of Qinghai Province, and the combination of Rangtang County, Ganzi County, Luhuo County, Shiqu County, Dari County and Banma County, Aba Tibetan and Qiang Autonomous Prefecture in the east, Banma and Dari Counties in Qinghai Province in the north, and Ganzi and Luohuo Counties in Ganzi Prefecture in the west and south. In 2011, Seda County covers an area of 9338.98 square kilometers and has jurisdiction over 2 towns, 15 townships and 134administrative villages, with a total population of 45661 at the end of the year, a birth rate of 11.09 ‰ and a natural population growth rate of 6.19 ‰. twenty