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.
Daying County, which belongs to Suining City, Sichuan Province, is located in the middle of Sichuan Basin, west of the middle reaches of Fujiang River, between 30 °29mm north latitude 30 °44' and 105 °15km east longitude, with a total area of 703 square kilometers. Daying County is a subtropical humid monsoon climate zone with mild climate and four distinct seasons. As of 2018, Daying County has jurisdiction over 9 towns and 2 townships, and the county government is stationed in Penglai Town. By the end of 2017, Daying County had a registered population of 544000 and a resident population of 484500. In the first year of Qin II Hu Hai (209 BC), the county was under the jurisdiction of Yizhou, Guanghan County, Guanghan County and Yi County (Jianjiang Town, Santai County), while Daying County was under the jurisdiction of Yixian County. Suining City was established in 1985. Pengxi County belongs to Suining City, Sichuan Province. October 1997