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.
Duilong Deqing District is under the jurisdiction of Lhasa City, Tibet Autonomous region, located in the central and southern part of Tibet Autonomous region, west of Lhasa City, with a total area of 2704.25 square kilometers, two streets, four towns and one township, with a total population of 48696 (2013). No. 1 Tuanjie Road, Dongga Town, District people's Government. Duilong Deqing means "the paradise of Shanggu" in Tibetan. The region is located in the middle reaches of the Yarlung Zangbo River valley, the southern foot of Nianqing Tanggula Mountain, with an average elevation of about 4500 meters, high in the northwest and low in the southeast. Lhasa River and Duilong River flow through the territory. It is rich in solar energy, hydropower and geothermal resources. Tourist attractions include Chubu Temple, Sangmu Folk Natural Village, Qiu Sang Hot Spring and so on. Gu Rong Ciba is a specialty of Duilong Deqing. Agriculture and animal husbandry is the economic foundation of Duilong Deqing. In the 21st century, especially after the opening of the Qinghai-Tibet Railway.