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.
Yongcheng, Shangqiu City, Henan Province, escrow county-level city, Yongcheng is located in the easternmost part of Henan Province, located in the junction of Henan, Shandong, Jiangsu and Anhui provinces, known as "the gateway to the east of Henan". Yongcheng has a total area of 2020 square kilometers and a cultivated land area of 1.8 million mu. As of 2018, Yongcheng has jurisdiction over 25 towns and 4 townships, and the municipal government is located in the north of people's Square in the middle of Dongfang Avenue. By the end of 2018, Yongcheng had a total population of 1.576 million and a resident population of 1.2388 million. Yongcheng gets its name because the city has been repeatedly beaten by water, which means "the city of eternity". During the Anti-Japanese War, it was the seat of the provincial party committee of the Henan-Anhui-Soviet Border region of the Communist Party of China during the Anti-Japanese War. In 1996, it was withdrawn from the county and set up a county-level city. In 2014, it became a river.