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.
Hua'an County (ancient Zhangzhou capital Longxi County) is located in the south of Fujian Province, northwest of Zhangzhou City, the middle reaches of the North Stream of the Jiulong River, known as & quot; North Stream Pearl-quot;. Adjacent to Zhangping, Anxi, Changtai, Yancheng, Nanjing. 150 kilometers away from Xiamen, it is one of the coastal open counties in Fujian Province. it is also the county with the largest concentration of Alpine compatriots in the mainland of the motherland. it is the largest forestry commodity production base in southern Fujian and a key forestry county in Fujian Province. Speak Hokkienese. Hua'an belongs to the "former Central Soviet area County". It is a world cultural heritage site, a national forest park, a national ecological construction demonstration county, a national key tea-producing county, a national tea characteristic county, a hometown of famous tea in China, a county with advanced scientific and technological progress, a county with advanced scientific and technological work, and a hometown of Pingshan pomelo in China.