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.
Xichou County, a county under the jurisdiction of Wenshan Zhuang and Miao Autonomous Prefecture in Yunnan Province, is located in the southeast of Yunnan Province, south-central of Wenshan Zhuang and Miao Autonomous Prefecture; the terrain rises from the middle to the west and is lower in the southeast; it belongs to the subtropical low-latitude mountain monsoon climate zone; the total area is 1506 square kilometers and has jurisdiction over 2 towns and 7 townships; in 2017, the resident population is 263000, including 5 ethnic minorities. Xichou County has the Mausoleum of Martyrs in Southern Xinjiang, as well as Xiaoqiaogou Provincial Nature Reserve, Xiangping Mountain rare Botanical Garden, Lion Rock Cliff painting, and Xisa Immortal Cave Paleolithic sites. On September 25, 2018, he won the honorary title of "2018 e-commerce into rural comprehensive demonstration county" of the Ministry of Commerce. On April 30, 2019, the people's Government of Yunnan Province decided that Xichou County would withdraw from the sequence of poor counties. 2017