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.
Hanyuan County, under the jurisdiction of Ya'an City, Sichuan Province, is located in the south of the western part of Sichuan Province, with geographical coordinates between 102 °16 miles east longitude and 29 °05 miles north latitude. It is bordered by Jinkou River District of Leshan City and Hongya County of Meishan City to the east, Ganluo County of Liangshan Yi Autonomous Prefecture in the south, Luding County of Ganzi Tibetan Autonomous Prefecture and Shimian County of Ya'an City to the west, and Yingjing County of Ya'an City to the north; the whole territory is 71.4 km long from east to west and 70.1 km wide from north to south. The county covers an area of 2388 square kilometers, is a subtropical monsoon humid climate, warm in winter and cool in summer, with four distinct seasons. As of 2016, Hanyuan County has jurisdiction over 30 townships (5 ethnic minority townships), and the county seat is located in Fulin Town. As of 2017, Hanyuan County has a total population of 319300. Hanyuan County, the ancient name of Yidu, belongs to