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.
Dazhu County, which belongs to Dazhou City, Sichuan Province, is located in the east of Sichuan Province and the south of Dazhou City. It spans 106 °59 miles east longitude and 107 degrees 32 miles north latitude, 31 °00 degrees north latitude, Liangping District and Dianjiang County of Chongqing City in the east, Linshui County in the south, Guang'an District and qu County in the west, and Dachuan District in the north. It has been included in the Qinba Mountain Poverty Alleviation and Development Zone, the Chengdu-Chongqing Economic Zone Chongqing Guangda Economic Development Zone, and the northeast Sichuan urban agglomeration. Dazhu County got its name from "more bamboo". Wu Zetian of the Tang Dynasty saw the first year (AD 700) to buy the county; known as "the hometown of Ramie in China", "the first County of Chinese Toona", "the Capital of mash in China", "the hometown of glutinous Rice in China", "the hometown of Green Bamboo in East Sichuan"; there is Wufengshan National Forest Park, and there are ancient official post roads that started in the pre-Qin Dynasty and flourished in the three Kingdoms.