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.
Dangxiong, which means "selected grassland" in Tibetan, belongs to the Tibet Autonomous region and is located in the middle of the Tibet Autonomous region at the junction of southern and northern Tibet. It covers an area of 10036 square kilometers (2013) Dangxiong County has a plateau continental climate, with 2881 hours of annual sunshine. The annual precipitation is 481 mm. The gale above level 8 can reach 74 days a year. Up to 128 days. The main natural disasters are snow disasters, followed by wind disasters, drought, insect disasters, rodent disasters and so on. From January to June 2014, Dangxiong County's tourism revenue was 14.41 million yuan, an increase of 27.31 percent over the same period last year; it received 145698 tourists, an increase of 44.61 percent over the same period last year. In October 2018, the people's Government of Tibet Autonomous region formally approved Dangxiong County to withdraw from poverty-stricken counties (districts).