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.
Zhongwei City, referred to as & quot; Wei & quot;, belongs to Ningxia Hui Autonomous region, is located in the central and western part of Ningxia Hui Autonomous region, Ningxia, Inner Mongolia and Gansu provinces. It is the first self-flow irrigation city in the middle and upper reaches of the Yellow River, with a total area of 17000 square kilometers. The topography of Zhongwei City is high in the southwest and low in the northeast, with an average elevation of 1225 meters in the urban area. the geomorphology is divided into five units of the Yellow River alluvial plain, platform, desert, mountains and hills, which belongs to a typical temperate continental monsoon climate. Due to the influence of desert, the sunshine is sufficient and the temperature difference between day and night is large. Zhongwei Yellow River diversion Irrigation area of 1.11 million mu, is an important commercial grain, aquatic products and facility vegetable production base in Northwest China. As of 2016, Zhongwei City has jurisdiction over Shapotou District, Zhongning County and Haiyuan County. 2016