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.
Ningguo, under the jurisdiction of county-level cities in Anhui Province, is hosted by Xuancheng. Located in the southeast of Anhui Province, the northern foot of Tianmu Mountain, the upper reaches of Shuiyang River. The total area is 2487 square kilometers, with a registered population of 384000 (2018). It has jurisdiction over 6 streets, 8 towns and 5 townships. No. 1 Shifu Lane, Renmin Road, Xijin Street, where the Municipal people's Government is stationed. Ningguo has a history of more than 1800 years since the thirteenth year of Jian'an in the Eastern Han Dynasty (208 years). In 1997, the State Council agreed to abolish Ningguo County and set up Ningguo City at the county level. Ningguo is located in the mountainous and hilly area of southern Anhui, which is high in the south and low in the north, with undulating mountains and rivers from east to west; the highest point is Longwang Mountain in the southeast, 1587 meters above sea level; the lowest point is Gangkou Town in the north, which is only 40 meters above sea level; it belongs to North Asian fever.