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.
Wutongqiao District, which belongs to Leshan City, Sichuan Province, is located in the southwest of Sichuan Province, with geographical coordinates of 103 °39mm east longitude 103 °56pm and 29 °175mi 29 °31 'north latitude. It is bordered by Leshan and Chengdu in the north, Zigong, Neijiang and Shunmin River in the east, Yibin, Luzhou, Chongqing and the three Gorges of the Yangtze River in the east, Panzhihua and Xichang in the west, and 20 kilometers away from Leshan City. Wutongqiao District has a long history of industrial development. It is an important industrial base in Sichuan, a chemical base in Sichuan Province, and one of the top ten raw material bases of the Ministry of Light Industry. At the same time, Wutongqiao District is also the birthplace of farm music. After the major adjustment of administrative divisions in 2004, Wutongqiao District has a total area of 474 square kilometers and has jurisdiction over 11 towns and 1 township.