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.
Huangzhou District, which belongs to Huanggang City, Hubei Province, is an important part of Wuhan City Circle. It is located in the eastern part of Hubei Province, at the southern foot of the Dabie Mountains, and on the north bank of the middle reaches of the Yangtze River. It is the political, economic and cultural center of Huanggang City, facing Ezhou City across the river. It's only an hour's drive from Wuhan. By 2015, the region had jurisdiction over three towns, one township, four streets and one economic development zone. By 2016, the region had a total population of 400000 people and an area of 353square kilometers. The topography of Huangzhou District is high in the northeast and low in the south and west. It is a river alluvial zone, dominated by plains, hills and hills, and has many lakes. The climate of Huangzhou area belongs to subtropical monsoon climate. There are more than 20 lakes and reservoirs in Huangzhou District, such as Caijiatan, Yujiatan, Baitan Lake, Yiai Lake, Happiness Reservoir and so on. There are Dongpo Chibi, Yuwangcheng and Anguo in the area.