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.
Jiangsu, referred to as "Su" for short, is a provincial administrative region of the people's Republic of China. Nanjing, the provincial capital, is located on the east coast of Chinese mainland. Jiangsu is bounded by latitude 30 °45 & # 39; Jiangsu is bounded by plains, waters, hills and hills; and longitude is 116 °18 & # 39; between them, it is bounded by Shandong to the north, the Yellow Sea to the east, Zhejiang and Shanghai to the southeast, and Jiangsu across the Yangtze River and Shanghai to the west. There are many lakes and flat landforms, consisting of plains, waters, low mountains and hills; across the Yangtze River and Huaihe River. Jiangsu Province belongs to the East Asian monsoon climate region, which is located in the transitional zone of subtropical and warm temperate zone, and the climate has the characteristics of both south and north. Jiangsu is located in the Yangtze River economic belt and has jurisdiction over 13 districts and cities, all of which are in the top 100. Jiangsu is the only province where all prefecture-level cities are among the top 100.