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.
Hejiang County, which belongs to Luzhou City, Sichuan Province, is located at the junction of Sichuan, Chongqing and Guizhou, on the southern edge of Sichuan Basin. It is adjacent to Jiangyang District, Naxi District and Lu County in the west, Jiangjin District of Chongqing City in the east, Yongchuan District in the north and Chishui City and Xishui County in Guizhou Province to the south. Hejiang County is 38.7km away from Luzhou, 260.1 km from Chengdu and 109.2 km from Chongqing. It is the first port county of the Yangtze River out of Sichuan. There are 54 km of the Yangtze River and 57 km of golden waterway of Chishui River. Hejiang County, which was founded in the second year of Yuanding in the Western Han Dynasty (115 BC), is one of the three earliest counties in the upper reaches of the Yangtze River. There are national forest parks, provincial scenic spots, Fubao tourist area, Chinese historical and cultural towns Fubao Ancient Town and Yaoba.