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.
Jiange County, which belongs to Guangyuan City, Sichuan Province, is located at the northern edge of Sichuan Basin, the junction of Sichuan, Shaanxi and Gansu provinces, located in the north of Sichuan Province and the southwest of Guangyuan City, guarding the natural danger of Jianmen. "Jiange is towering and towering into the clouds, as long as it is guarded by one person, thousands of troops are difficult to capture." it is known as "the Golden Triangle of Northern Sichuan" and "the Pearl of Shu Road". The county covers an area of 3204 square kilometers and has jurisdiction over 27 towns and 30 townships, with a total registered population of 657700 at the end of 2017. Dangde County was first established at the end of the Eastern Han Dynasty, and Nanan County was set up in Pu'an Town in the Northern and Southern dynasties during the Liu Song Dynasty. After the reform, Jianzhou was changed to Jiange County in 1913, and the county seat moved to Xiasi Town in September 2003. The work of withdrawing counties and building cities was officially launched in April 2015, and it is planned to complete the declaration of Jianmenguan City at the county level in 2017. Beijing and Kunming