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.
Xi'an District is located in the southwest of Mudanjiang City, Heilongjiang Province, with a total area of 445 square kilometers. It has jurisdiction over five subdistrict offices: Wenchun Town, Hainan Korean Township and Pioneer, Torch, Peony, Jiangbin and cement. With a total population of 249000 (2011), the Korean ethnic group accounts for the majority of the 16 ethnic minorities, about 16500. Mudanjiang passes through the city, and the green coverage rate in the urban area is 42%. In 2011, the added value of the district completed 2.22 billion yuan. As of 2013, it has thousands of wild economic plants, more than 50 kinds of rare animals and more than 40 kinds of rich mineral resources. Rich in ginseng, Acanthopanax senticosus, astragalus, hericium Erinaceus, black fungus, bracken and other valuable mountain products. In addition, Xi'an District also has Baoshan Lake Villa, Jingpo Lake and other tourist attractions. December 2018, confirmed by the Ministry of Civil Affairs