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.
Huangshi, a prefecture-level city in Hubei Province, is located in the southeast of Hubei Province, on the south bank of the middle reaches of the Yangtze River, facing the Yangtze River in the northeast, across the river from Huanggang City, Echeng District of Ezhou City in the north, Jiangxia District of Wuhan City and Liangzihu District of Ezhou City in the west, Xianning District and Tongshan County in Xianning City in the southwest, and Wuning County and Ruichang City in Jiujiang City, Jiangxi Province in the southeast. Huangshi is one of the first two provincial municipalities established in Hubei Province after the founding of the people's Republic of China, the deputy central city of Wuhan city circle, an important member of the urban agglomeration in the middle reaches of the Yangtze River, an important raw material industrial base in central China, and a national pilot city for resource depletion transformation. it is also an open city along the river approved by the State Council. In June 2017, Huangshi was named the national health city. Huangshi City has a total land area of 4583 square kilometers and has jurisdiction over four municipal districts as of the end of March 2017.