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.
Donga County, which belongs to Liaocheng City, Shandong Province, is located in the west of Shandong Province, with Mount Tai in the east and the Yellow River in the south, with a total area of 729 square kilometers. As of the end of 2017, Donga County has jurisdiction over 10 towns and streets and one provincial economic development zone, with a household registration population of 409500. Donga County set up a city in the Spring and Autumn period and a county in the Qin Dynasty, which has a history of more than 2000 years. There are cultural relics such as Dawenkou Culture, Longshan Culture, Cangjie Tomb, Dengmiao Stone statues, Fanji Temple, Jingjue Temple and so on. By the end of 2017, Dong'e County has one national 4A scenic spot, three 3A scenic spots, one national Yellow River Forest Park and one national wetland park in Dong'e Ejiao City. National Highway 105, National Highway 341 and three provincial highways run through the whole territory of Donga County. In 2018, Donga County realized the total production.