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.
Dongchangfu District, which belongs to Liaocheng City, Shandong Province, is located in the west of Shandong Province, Donga County, Chiping County and Liaocheng Economic and technological Development Zone in the east, Yanggu County in the south, Guan County and Shen County in the west, and Linqing in the north. By the end of 2013, the region has a total area of 844 square kilometers, including 12 towns (streets), 2 parks and 643 villages (communities). The total registered population of the district is 771100. In 2013, Dongchangfu District achieved a GDP of 24.248 billion yuan, an increase of 10.2% over 2012. Of this total, the added value of the primary industry is 3.024 billion yuan, the secondary industry is 10.171 billion yuan, and the tertiary industry is 11.053 billion yuan. Dongchangfu District has a long history and splendid culture. During the Ming and Qing dynasties, Dongchang Prefecture benefited from the prosperity of water transport in the Beijing-Hangzhou Grand Canal.