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.
Shifang, a county-level city under the jurisdiction of Sichuan Province and hosted by Deyang City, is located in the Chengdu Plain in the hinterland of Sichuan Basin, adjacent to Mianzhu City and Jingyang District in the east, Guanghan City in the south and Pengzhou City in the west, belonging to the subtropical humid climate zone; it has jurisdiction over 2 streets and 14 towns with a total area of 864 square kilometers and a total population of 430000 in 2017. Shifu once enjoyed the reputation of "Yuji fairy hometown" because of the footprints of Dayu. Li Bing, a famous hydrologist in the Qin Dynasty, once treated the water here and died here. Shifang is also the hometown of Ma Daoyi, the eighth ancestor of Southern Zen Buddhism, and the sealed place of Yongya, a famous general of Han Dynasty, so Shifang City is also known as Yongcheng. The main natural landscapes of Shifang are Fenghua Mountain, Qingniutuo and so on. On December 14, 2017, Shifang was awarded the fourth civilized Model City of Sichuan Province. In November 2018, it was confirmed by the Ministry of Science and Technology