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.
Zhoucun District, which belongs to Zibo City, Shandong Province, is located in the west of Zibo, Zhangdian District in the east, Zichuan District in the south, Zhangqiu District in Jinan City in the southwest, Zouping City in Binzhou City in the northwest, and Huantai County in the northeast, with a total area of 307 square kilometers. The topography of Zhoucun District is high in the south and low in the north. The filial piety River, Fanyang River, Huan River, Migou River and Shuizhuo River flow through the territory. It belongs to the continental climate of the north temperate zone, with an average annual temperature of 13.1 ℃ and an average annual precipitation of 646.3 mm. Mineral deposits include bauxite, scorched gemstones, quartz, refractories and so on. It is an important textile industry base in Shandong Province. Agriculture mainly produces wheat, corn and soybeans. Jiaoji railway, 309, 308 national highway transit. Major tourism