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.
Boshan District, which belongs to Zibo City, Shandong Province, is located in the middle of Shandong Province, in the north of Shandong Province, in the south of Zibo City, bordering Yiyuan County in the south, Laiwu City in the southwest, Zhangqiu City in the northwest, Zichuan District in the east and north, between longitude 117o43km east, latitude 36 °16km, north latitude 36 °16km, north-south 49.4km long, east-west width 20km, total area 698.2 square km. The scenic spots in Boshan District are part of the World Cultural Heritage Great Wall, such as Qi Great Wall, Yan Wenjiang Temple, Bixia Yuanjun Palace, Yuhuang Palace, Fan ancestral Hall, Fenghuang Mountain and so on. Boshan District has honorary titles such as "hometown of Chinese Ceramic Glass Art", "famous City of Chinese pump Industry", "hometown of Chinese Glass", "famous City of Chinese Shandong cuisine" and so on.