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.
Kunshan, a county-level city under the jurisdiction of Jiangsu Province, is hosted by Suzhou City. It has been more than 2200 years since Zilou County in the Qin Dynasty. Kunshan is the birthplace of Kunqu Opera, the ancestor of a hundred operas. Kunshan culture belongs to Wu-Yue culture, and the people of Kunshan belong to the people of Jiangsu and Zhejiang provinces. In September 2010, Kunshan, Vienna, Singapore and other five cities won the UN Habitat Award of the year. In January 2016, Kunshan was named the first batch of "National Ecological Garden cities" by the Ministry of Housing and Urban-Rural Development. In 2018, Kunshan achieved a GDP of 383.206 billion yuan. In 2019, Kunshan was named one of the top 100 counties and cities with comprehensive strength in 2019, one of the top 100 green development counties in 2019, and one of the top 100 new urbanization quality counties and cities in 2019. The second batch of national agricultural products