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.
Dongyang City, a county-level city under the jurisdiction of Zhejiang Province, is hosted by Jinhua City and is located in the middle of Zhejiang Province; Huaiji Mountain, Dapanshan and Xianxialing extend into the country, forming a landform of three mountains with two basins and two rivers, with high terrain in the east and low in the west, belonging to the subtropical monsoon climate zone; it has 6 streets, 11 towns and 1 township, with a total area of 1746.81 square kilometers and a total population of 847800 in 2018. Dongyang is located in the middle of Zhejiang Province, with Yongjin Expressway and Zhuyong Expressway crossing in the middle of Zhejiang Province, which is the transportation hub of central Zhejiang. Since ancient times, Dongyang has had the tradition of "starting learning and emphasizing teaching, ploughing and studying hard". Zhu Xi, Lu Zuqian and Lu you once lectured and preached at the "Stone Cave Academy" in Dongyang. Dongyang ancient residential buildings are mainly wood carvings in Dongyang, which integrates decorative arts such as bamboo weaving, stone carving, brick carving and heap carving, forming a unique Confucian school.