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.
Jingbian County, which belongs to Yulin City, Shaanxi Province, is located in the north of Shaanxi Province, southwest of Yulin City, adjacent to Wushen Banner and Etok Banner in Inner Mongolia Autonomous region in the north, Zichang County, Ansai District, Zhidan County and Wuqi County in Yan'an City in the south, and adjoining Hengshan County and Dingbian County in the east and west. It is between 108 °17 miles east longitude 109 °20 'and 36 °58 miles north latitude 38 °03', with a total area of 5088 square kilometers. The history of Jingbian is known as "Xiazhou" and "Shuofang". Yu Wenkai, a great architect of the Sui Dynasty, planned, designed and presided over the construction of Daxing City (Chang'an City in Tang Dynasty), which became an example of urban construction in later generations. The site of Tongwancheng, the capital of the Great Xia Kingdom, is the only capital site left over by the Huns in human history. In 24 (1935), Jingbian County of the Communist Party of China