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.
Daofu County belongs to Ganzi Tibetan Autonomous Prefecture of Sichuan Province, which is located in the northwest of Sichuan Province and northeast of Ganzi Prefecture. The geographic coordinates are 100 °32 degrees east longitude and 101 °44 degrees east longitude, and 30 °32 'north latitudes. The Xianshuihe fault zone, located on the southeast edge of the Qinghai-Tibet Plateau, is bordered by Danba in the east, Xinlong County in the west, Kangding County and Yajiang County in the south, and Jinchuan and Rangtang Counties in Luhuo and Aba Prefecture in the north. Daofu County covers an area of 7053 square kilometers and has jurisdiction over 4 towns and 18 townships. At the end of 2011, the registered population was 55290, with a natural population growth rate of 7.22 ‰ and a birth rate of 11.37 ‰. The regional GDP of Daofu County in 2011 was 483 million yuan, an increase of 13% over 2010, and the per capita disposable income of urban residents reached 12773 yuan.