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.
Ziyang County, which belongs to Ankang City, Shaanxi Province, is located in the south of Shaanxi Province, the upper reaches of the Han River, the northern foot of Daba Mountain, Hanbin District and Langao County in the east, Zhenba County in the west, Chengkou County and Wanyuan City in the south, and Hanyin County in the north. The total area is 2204 square kilometers between longitude 108o 06m / m 108 °43m east and latitude 32 °08m / m 32 °49' north. Ziyang County is named after Zhang Pingshu (No. Ziyang), founder of the Southern School of Taoism. Ziyang has convenient transportation, Xiang-Chongqing Railway and Baomao Expressway pass through the country, and have successively won the reputation of "hometown of selenium Valley", "Gallery of Hanjiang River", "hometown of Chinese Folk Art" and "hometown of Folk songs", known as "hometown of tribute Tea". In 2018, Ziyang County has jurisdiction over 17 towns with a resident population of 286700, achieving a GDP of 10.365 billion.