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.
Heshui County, which belongs to Qingyang City, Gansu Province, is located in the east of Gansu Province, between longitude 107 °51 & #39;-108 °42 & #39;, latitude 35 °36 & #39;-36 °37 & #39;, Fuxian County, Shaanxi Province in the east, Xifeng District and Qingcheng County in the west, Ningxian County in the south, Huachi County and Zhidan County in Shaanxi Province in the north. The total area is 2941.78 square kilometers. As of 2016, Heshui County has jurisdiction over 5 towns and 7 townships, a total of 5 communities, 80 villages and 498 village groups, with a total population of 178400. There are nine ethnic groups, including Han, Hui, Mongolian, Manchu, Dongxiang, Miao, Zhuang, Tujia and Yugu. It is the famous hometown of Yellow River elephants and ancient stone carvings.