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.
Yangxin County, which belongs to Binzhou City, Shandong Province, is a county-level administrative district, which is located in the center of the development of the Yellow River Delta plain. Han Xin, a famous general of the Han Dynasty, got his name from the Yang of the Gudu River in Yanfuan Qi. Yangxin County, with a total area of 793square kilometers and a population of 450000 (2010), has jurisdiction over two subdistrict offices, seven towns and one township. Yangxin is the first batch of comprehensive reform pilot counties in China, and it is the pilot area of reform and opening up in Shandong Province. Yangxin is China's high-quality wheat production base county, China's advanced scientific and technological work county, China's top 100 animal husbandry county, China stainless steel production base county.