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.
Haibei Tibetan Autonomous Prefecture, under the jurisdiction of Qinghai Province, is located in the northeast of the Qinghai-Tibet Plateau and on the western edge of the Loess Plateau. It has a total area of 34389.89 square kilometers and has jurisdiction over three counties and one autonomous county. In 2017, it has a resident population of 283000. There are 36 sites in Haibei Tibetan Autonomous Prefecture which have been announced by the people's Government of Qinghai Province. Among them, the national cultural relics protection units are Xihai County Zhilongyi City in the Western Han Dynasty; there are 11 cultural relics protection units at the provincial level; more than 40 tombs have been cleared and more than 700 cultural relics have been unearthed. This is also the place where Mr. Wang Luobin collected the style when he wrote the famous song "in that distant place". In 2017, the gross domestic product of Haibei Tibetan Autonomous Prefecture was 8.291 billion yuan, down 20.3% from the previous year at comparable prices.