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.
Haiyan County, which belongs to Jiaxing City, Zhejiang Province, is one of the earliest established counties in Zhejiang Province, founded in Qin. Haiyan County is located in the northwest of Hangzhou Bay, 118 kilometers away from Shanghai and 98 kilometers away from Hangzhou. It has jurisdiction over 4 streets and 5 towns, with a land area of 534.73 square kilometers and an estuarine bay area of 537.90 square kilometers. In the sixth national census in 2010, the resident population of the county was 430900. Sea salt is known as "the land of fish and rice, the house of silk, the land of etiquette, the place of tourism". It was listed as a coastal economic open zone by the State Council in 1985 and is one of the top 100 counties with comprehensive strength in China. In November 2018, he was selected into the top 100 industrial counties (cities) in 2018. In December 2018, it was selected as one of the top 100 county economic investment potential in China. The quality and safety of the second batch of national agricultural products