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.
Taishan District, which belongs to Taian City, Shandong Province, is located in the middle of Taian City, north by Mount Tai, bordered by Daiyue District, Taian City on the east and southwest, and adjoining Licheng District and Changqing District of Jinan City in the north, with a total area of 336.86 square kilometers. It is the political center, economic center and transportation center of Tai'an. As of 2018, Taishan District has jurisdiction over 5 streets, 2 towns and 1 township. In 2016, Taishan District had a resident population of 786200, with a regional gross domestic product (GDP) of 48.629 billion yuan, of which the added value of the primary industry was 984 million yuan, the secondary industry was 16.147 billion yuan, the tertiary industry was 31.498 billion yuan, and the proportion of the three industries was 2.02 33.21. On October 8, 2019, he was selected as 201