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.
Yingtan, a city (prefecture level) under the jurisdiction of Jiangxi Province, is an important member of the urban agglomeration in the middle reaches of the Yangtze River. It is located in the transition zone from Wuyi Mountains to Pingyuan of Poyang Lake. The area has a mild subtropical humid monsoon climate; it has two districts and one city, with a total area of 3556.7 square kilometers; and a resident population of 1.1675 million in 2017. The Shanghai-Kunming high-speed railway, the Eagle-Xiamen line, the Zhejiang-Jiangxi line, the Anhui-Jiangxi line, the Shanghai-Kunming highway, the Ji-Guang highway and the 320 and 206 national highways in Yingtan City are crisscrossed in the urban area. Longhushan is a famous mountain described at the beginning of the classic Outlaws of the Marsh. It is famous for its beautiful Danxia, Taoist saints, ancient Yue songs and wonderful yin and yang at home and abroad. it is a world natural heritage site, world geopark and national 5A tourist scenery.