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.
Loufan County is a county under the jurisdiction of Taiyuan City, Shanxi Province, with geographical coordinates of 111 °31 degrees east longitude and 38 °13 degrees north latitude, located in the northwest of Taiyuan City, the hinterland of Luliang Mountain and the middle and upper reaches of the Fenhe River, 97 kilometers away from the provincial capital Taiyuan, east by Gujiao, west by Fangshan, adjacent to the city in the south, north by Jingle and bordering Lanxian County in the northwest. It is a national key county for poverty alleviation and development in mountainous areas, old areas and reservoir areas. It is also the most important water source and ecological barrier in Taiyuan. Loufan County has a total area of 1289 square kilometers. As of 2012, Loufan County has jurisdiction over 3 towns, 5 townships, 6 neighborhood committees and 142 administrative villages, with a total population of 123000, including an agricultural population of 96000. September 25, 2018, won the Ministry of Commerce "2018 e-commerce into rural areas"