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.
Fujian Province, referred to as "Fujian" for short, is a provincial administrative region of the people's Republic of China. Fuzhou, the provincial capital, is located on the southeast coast of China, bordering Zhejiang Province in the northeast, Jiangxi Province in the northwest, Guangdong Province in the southwest, and Taiwan Province in the southeast across the Taiwan Strait. Fujian Province has a total land area of 121400 square kilometers. The topography of Fujian is "by the mountain and near the sea", the terrain is high in the northwest and low in the southeast, and the area of mountains and hills accounts for about 90% of the total area of the province; it spans the four major river systems of Minjiang, Jinjiang, Jiulong River and Tingjiang, which belongs to the subtropical marine monsoon climate. By the end of 2019, Fujian Province has jurisdiction over Fuzhou, Xiamen, Quanzhou, Zhangzhou, Putian, Longyan, Sanming,.