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.
Xinyu City, under the jurisdiction of Jiangxi Province (prefectural level), an important member of the urban agglomeration in the middle reaches of the Yangtze River, is located in the west-central part of Jiangxi Province, in the west of Zhejiang-Jiangxi Railway, 101.9 kilometers from east to west, 65 kilometers from north to south, 150km east from Nanchang, the provincial capital, Zhangshu City and Xingan County in the east, Yuanzhou District, Yichun City in the west, Qingyuan District, Anfu County and Xiajiang County in Ji'an City in the south, Shanggao County and Gaoan City in the north. Xinyu City has a total area of 3178 square kilometers. According to the geomorphological map of Jiangxi Province, the geomorphology of Xinyu City belongs to the middle and low mountains and hilly areas of western Jiangxi. The basic landforms can be divided into six types: low mountains, high hills, low hills, hills, terraces and plains. Xinyu City has a subtropical humid climate with four distinct seasons, mild climate, sufficient sunshine, abundant rainfall, long frost-free period and short severe winter.