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.
Helong City, which belongs to Yanbian Korean Autonomous Prefecture of Jilin Province, is located in the southeast of Jilin Province, in the south of Yanbian Korean Autonomous Prefecture, at the eastern foot of Changbai Mountain, on the north bank of the upper reaches of Tumen River, bordering Longjing City in the east, Antu County in the west, Longjing and Antu cities and counties in the north, and the Democratic people's Republic of Korea in the south across the Tumen River. The population is 314995 (at the end of 2011), most of whom are ethnic Korean, accounting for 51.53% of the total population. It covers an area of 5068.62 square kilometers (2013). In 2015, Helong City achieved a GDP of 5.45 billion yuan. Helong City is known as the hometown of quot; song and dance & quot;, & quot; Jindalai hometown & quot;. In 1883, the Qing government and the Korean king