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.
Pishan County, Guang Xu 28 years home county, named after the ancient country. Uighurs call Pishan County "Guma", its meaning is still uncertain, there are "hut", "cage", "suspicious place" and so on. Interpretation of Tongwen Chronicles of the Western regions: "it is suspicious." In the early days, after their people practiced Islam, some of them fled because of their names. " Pishan County is located in the southern part of Xinjiang Uygur Autonomous region, the southern edge of the Taklimakan Desert and the northern foot of the Karakoram Mountains. It is bordered by Hotan County and Moyu County in the east, Yecheng County in the west, India and Pakistan in Kashmir in the south, and Maigaiti County and Bachu County in the north. It is located in longitude 77 °31'to 79 °38 'east and latitude 35 °22' to 39 °01 'north. The county is 423 kilometers from north to south and 67.5 to 144 from east to west.