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.
Yu'an District is the municipal district of Lu'an City. it is a new district established with the withdrawal of land and the establishment of the city in December 1999. Yu'an District is located in the west of Lu'an City, Jinan District in the east, Huoshan County in the south, Jinzhai County in the west and Shou County in the north. Yu'an District famous and special products are Liuangua tablets, Subu marijuana, Xuji peanut candy, etc.; scenic spots are Hengpaitou Scenic spot, Huanglian Temple, Jiugongzhai Scenic spot and so on. As of 2012, Yu'an District covers an area of 1926 square kilometers and has jurisdiction over 19 townships and 3 streets, with a registered population of 1002321. On September 25, 2018, he won the honorary title of "2018 e-commerce into rural comprehensive demonstration county" of the Ministry of Commerce. In March 2019, it was on the list of the first batch of revolutionary cultural relics protection and utilization districts and counties. April 29, 2019