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.
Luchun County is under the jurisdiction of Honghe Prefecture. Formerly known as "six villages", when the county was founded in 1958, Zhou Enlai personally named it Lvchun according to the characteristics of "green mountains and green waters, like spring all the year round". Luchun County is located in the south of Yunnan Province, in the southwest of Honghe Prefecture, bordering Yuanyang and Jinping counties in the east, Honghe County in the north, Mojiang County in the northwest, Lixianjiang County and Jiangcheng County in the southwest, and the Socialist Republic of Vietnam in the southeast. It is 312 kilometers away from the estuary border port and 132 kilometers away from the Jinshui River port. The provincial highway S214 passes through the county seat. By the end of 2012, Luchun County covers an area of 3096 square kilometers and has jurisdiction over one town and eight townships; the registered population is 233249, and the population of ethnic minorities is 230161, accounting for 98.7% of the registered population.