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.
Muchuan County, under the jurisdiction of Leshan City, Sichuan Province, is located in the southwest of Sichuan Basin, the triangle between Minjiang River, Dadu River and Jinsha River in the upper reaches of the Yangtze River. It is bordered by Yibin in the east, Pingshan County in the south, Shawan District and Jianwei County in the north, Ebian County in the west and Mabian County in the southwest. It covers an area of 1408 square kilometers with a population of 260000. The territory has fresh air, beautiful scenery, rich products and simple folk customs, with a forest coverage rate of 77.34%, known as "natural oxygen bar" and "green pearl". It is the pilot county of the national ecological civilization demonstration project, the national ecological demonstration area, the national key ecological functional area, the hometown of bamboo in China, the national greening model county, the national forestry science and technology demonstration county, and the best green eco-tourism county in China. On July 31, 2018, the Sichuan Provincial Government approved Muchuan County to withdraw from poverty.