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.
Xuanzhou District is under the jurisdiction of Xuancheng City, the resident of the municipal government and the only municipal district, and it is the transition zone of the Yangtze River Delta economy from the coast to the interior. Xuanzhou District is located at the junction of Jiangsu and Anhui provinces, adjacent to Shanghai and Zhejiang. It is bordered by Langxi County and Guangde County to the east, Ningguo City and Jing County to the southeast and southwest, Nanling County and Wuhu County to the west and northwest, and Gaochun District of Nanjing to the north. By the end of 2012, Xuanzhou District had jurisdiction over 26 townships, towns and streets, with a total area of 2621 square kilometers and a total population of 866000. The main landscapes in Xuanzhou District are Guangjiao Temple Twin Towers, Chenshan site, Yangzi Alligator National Nature Reserve, Jingting Mountain National Forest Park, Xie Lou site, Mei Wending Tomb, Baimashan International Holiday tourist area, Longquan Cave, Baiyun Cave and so on. Xuanzhou District was selected into the 2017 National Comprehensive.