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.
Keping County, in the late Ming and early Qing Dynasty, Keping was called Keping by the Han nationality and Ke'erping in Uygur language. It was not until 1903 when Fenfangxian was established as Keping, and it has been used ever since. Keping, which is said to mean "flood" or "Diwo Zi". Keping County is located in southern Xinjiang, the westernmost end of Aksu area, the southern foot of Altag Mountains, a branch of Tianshan Mountains, and the northern margin of Tarim Basin. The total area of the county is 12047 square kilometers, of which the mountain area is 6393 square kilometers, accounting for 53% of the total area of the county. The county has jurisdiction over one town and four townships, with a total population of 49000 in 2013. In 2012, the GDP of Keping County reached 672 million yuan, an increase of 21.8% over the same period in 2011.