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.
Hancheng is known as "Longmen", "Xia Yang" and "Shaoliang" in ancient times. Weinan City in Shaanxi Province is one of the important birthplaces of Chinese civilization and the hometown of Shi Sheng Tai Shi Company Ma Qian. At the beginning of the Western Zhou Dynasty, King Wu of Zhou sealed here, saying that South Korea, at the turn of the Spring and Autumn and warring States period, and King Zhou Ping, the son of Qin Zhong, was called Liang. During the warring States period, Qin established Xiayang County. Sui Kai Huang 18 years (598) home Hancheng County. It was changed to Hancheng City in January 1984 and was listed as an open city in Shaanxi Province in 1985. In 2006, it became the only city in Shaanxi Province that was awarded "China's Outstanding Tourism City" as a county-level city. In 2016, it was selected as the first batch of national global tourism demonstration zones. In 2017, it was selected as a national high-quality city demonstration city, the first batch of national food safety demonstration cities and national major municipal engineering leaders.