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.
Yihuang County, which belongs to Fuzhou City, Jiangxi Province, is located in the east-central part of Jiangxi Province and the south of Fuzhou City. Yihuang County was founded in Wu Taiping of the three Kingdoms for 2 years (257 AD). It has a history of 1759 years and gets its name because the county administration is located at the confluence of Yishui and Huangshui. Yihuang, known as the "opera town", is the birthplace of Erhuang Opera. Caoshan Temple in Yihuang is the ancestral court of the Zen Cao Dong sect. With a total area of 1944 square kilometers, the county has jurisdiction over 12 townships, 2 reclamation farms and 1 provincial industrial park, 139 administrative villages and 8 neighborhood committees with a total population of 240000, including she, Hui and Yao ethnic minorities, and most of the rest are Han nationality, belonging to the Jiangyou people. The topography and geomorphology of Yihuang County are mainly mountains and hills, and the general situation is "eight mountains and half water, one sub-field, half-divided roads and manors". Yihuang County has successively