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.
Shanyin County, a famous historical and cultural city, is a county under the jurisdiction of Shuozhou City, Shanxi Province, located in the north of Shanxi Province, between longitude 112 °25 mi 113 °04 east and latitude 39 °11 mi 39 °47 'north. It is adjacent to Ying County in the east, Pidai County in the south, Shuocheng in the west and Pinglu District II in the west, and borders Zuoyun, Youyu and Huairen in the north. The county has jurisdiction over 4 towns and 9 townships, with a total area of 1651 square kilometers and a total population of 241000 (at the end of 2018). County people's government in Daiyue town. The average annual temperature is about 7 ℃. In 2018, the GDP of the region reached 17.969 billion yuan. Shanyin County is rich in natural resources, mainly coal, which is a major coal-producing county, known as "coal township". On September 7, 2018, the Shanxi provincial government formally approved the withdrawal of the "provincial poverty-stricken county" of Shanyin County.