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.
Anduo County, which belongs to Naqu City, Tibet, is located in northern Tibet, on the north and south sides of the famous Tanggula Mountains, adjacent to Zhiduo County, Zaduo County and Nierong County in Qinghai Province in the east, Xeni District in the south, Bango County and Shuanghu County in the west, and Golmud City in Qinghai Province to the north. It is the north gate of Tibet. Anduo County covers an area of about 100000 square kilometers and has jurisdiction over 4 towns, 9 townships, 79 administrative villages, and the county people's government in Pana Town. Anduo County is rich in natural mineral resources and is a natural wildlife kingdom. Special circumstances: Anduo County currently has several (immigration management) townships in the west of Qinghai Province. Anduo County was hit by a severe snowstorm in the winter of 1962. The following year, it was called Township through some places in Tanggula Town of Qinghai Province, Zhiduo County, Zaduo County and Golmud City. Later, several immigration management systems were set up.