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.
Bachu County, which belongs to the Kashgar area of Xinjiang Uygur Autonomous region, is located in the southwest of Xinjiang Uygur Autonomous region, at the southern foot of Tianshan Mountain, the edge of Tarim Basin and Taklimakan Desert. The geographical coordinates are 77 °22 °30 "- 79 °56 °15" east and 38 °47 "30"-40 °17 "30" north, opposite Awati County and Moyu County in the east, Maigaiti County, Shache County and Pishan County in the south, Jiashi County and Yuepu Lake County in the west, Keping County and Aheqi County in the north bounded by Keping Mountain and Karatag Mountain, and Atushi City in the east of Bachu County. In 2014, Bachu County has a total area of 21741.3 square kilometers; it has jurisdiction over 4 towns and 8 townships; in 2014, Bachu County has a total population of 377949; in the first half of 2015, it completed