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.
Dingzhou City, Hebei Province under the jurisdiction of county-level cities, by Baoding City escrow, Hebei Province directly administered by the county (city) system reform pilot county. Located at the eastern foot of Taihang Mountain, the western edge of North China Plain and the west of central Hebei Province, it has been known as "Kyushu throat, Shenjing brief area" since ancient times. With a total area of 1283.7 square kilometers and a resident population of 1.2269 million (2018), it has jurisdiction over 4 streets, 16 towns and 5 townships. Dingzhou City, located in the Beijing-Tianjin-Hebei Economic Zone, is an important node city in the Beijing-Tianjin-Hebei Economic Zone, a national comprehensive pilot area of new urbanization, a modern medium-sized city cultivated in the 12th five-year Plan of Hebei Province, and one of the ten famous historical and cultural cities in Hebei Province. In 2018, the gross domestic product of Dingzhou City reached 33.284 billion yuan, an increase of 7.3% over the same period last year.