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.
Taiyuan, the capital of Shanxi Province, abbreviated as "Union ng", also known as Jinyang and Longcheng in ancient times, is an excellent tourist city in China, a famous national historical and cultural city, a national garden city, a core city in Taiyuan metropolitan area, and a political, economic, cultural, transportation and international exchange center of Shanxi Province. it is a city with a history of more than 4700 years and 2500 years. The historical capital of the city of Wuyuan. Taiyuan is surrounded by mountains on three sides, and the Fenhe River, the second largest tributary of the Yellow River, flows from north to south. It has been known as "Beautiful Taiyuan City" since ancient times. It is an important military and cultural town in northern China, a capital of Jin businessmen in the world, and one of China's energy and heavy industrial bases. The urban spirit of Taiyuan is tolerance, morality, law, integrity and excellence. Taiyuan city