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.
Taibai County is located in the southeast of Baoji City, Shaanxi Province, located in the hinterland of the Qinling Mountains, named because Taibai Mountain, the main peak of the Qinling Mountains, is in the territory. The highest elevation in the territory is 3767 meters, the lowest is 740meters, the average elevation is more than 1000 meters, and the county seat is 1543 meters above sea level, which is the highest among the counties in Shaanxi Province. With an annual average temperature of 7.7 ℃ and an average temperature of 19 ℃ in summer, it is a veritable "natural air-conditioned city" and a popular resort for snow and summer heat. "Taibai Snow June" is one of the eight famous scenic spots in Guanzhong. On December 2, 2017, Taibai County was awarded "the most beautiful cultural and eco-tourism county in China and the best eco-leisure tourism county in China". September 25, 2018, obtained the Ministry of Commerce "2018 e-commerce into rural areas comprehensive"