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.
Zhejiang, referred to as "Zhejiang" for short, is a provincial administrative region of the people's Republic of China. Hangzhou, the provincial capital, is located on the southeast coast of China, Zhejiang is bounded by 118o01 & # 39th longitude 118o01 & # 39between118o01 & # 39between27o02 & # 39between31 °11 & # 39between East China Sea, Fujian to the south, Anhui and Jiangxi to the west, and Shanghai and Jiangsu to the north. Qiantang River, the largest river in the territory, is also called Zhejiang because of its tortuous rivers. The province is named after Jiang, abbreviated as & quot; Zhejiang & quot;. Zhejiang Province has a total area of 105500 square kilometers. The topography of Zhejiang is inclined from southwest to northeast, and the topography is complex. The mountains form three roughly parallel branches from southwest to northeast. Across Qiantang River, Oujiang River, Lingjiang River, Tiaoxi River, Yongjiang River, Feiyun River, Aojiang River and Cao'e River