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.
Ruzhou is the capital of Ru porcelain and the hometown of Ququ Opera; Henan Province directly manages the county-level city. A regional central city in southwestern Henan. It is located in the central and western part of Henan Province, relying on the towering Songshan Mountain in the north, Funiu in the south, Luoyang, the ancient capital in the west, and the Huang-Huai Plain in the east. Beiru River runs through the whole territory from west to east. The total area is 1573 square kilometers and the total population is 1.2 million. It has jurisdiction over 2 townships, 13 towns, 5 subdistrict offices and 453 administrative villages. Ruzhou is located at the junction of Zhengzhou, Luoyang, Pingdingshan and Xuchang. Jiaoliu Railway and National Highway 207 run from north to south and connect with Longhai Line and Beijing-Guangzhou Line. Sanyang Railway (planned to be built), National Highway 344 (planned to be built) Luojie Highway, Nanluo (Nanjing-Luoyang) Expressway, Erguang Expressway, Lin (Ruzhou-Ruzhou-Tongbai) Expressway (Linzhou-Ruzhou-Tongbai) runs from east to west, and with Beijing.