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.
Xinhua County, Loudi City, Hunan Province belongs to the county. Located in 27 °31 N & #39;-28 °14 E, 110 °45 °M ü 111 °41 °E, located in the middle of Hunan Province, the middle reaches of Zijiang River, the southeast foot of the northern section of Xuefeng Mountain (ancient Meishan). The area covers a total area of 3642 square kilometers and has jurisdiction over 26 townships, 2 state-owned forest farms and 1 economic development zone, with a population of 1.5 million (2016). The territory is mostly hilly basins, belonging to the mid-subtropical monsoon humid climate, pleasant environment, known as "the treasure land of central Hunan". Xinhua is a key forest county with mineral resources such as coal, silicon, tungsten, arsenic, graphite, tin, lead, zinc, copper, antimony, magnesium, gold, kaolin and limestone. In September 2015, the Department of Land and Resources of Hunan Province promoted the reform of the economic system of counties directly administered by the province.