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.
Jiangkou County, under the jurisdiction of Tongren area, is located in the northeast of Guizhou Province and on the slope of the transition from Guizhou Plateau to Xiangxi hills. The geographical location is 108o 30km east longitude 109o 06km east longitude, 27o 27km north latitude, 27o 58km north latitude, 52km east-west length and 55km north-south width, with a total area of 1869 square kilometers. It is adjacent to Tongren City in the east, Cengong County in Qiandongnan Prefecture in the south, Shiqian County and Yinjiang County in the west, and Songtao Miao Autonomous County in the north. The total area is 1869 square kilometers and the total population is 237000 (2012). In 2013, Jiangkou County completed a local GDP of 2.769 billion yuan, an increase of 17% compared with 2012; the county's total financial revenue reached 240 million yuan, and public revenue reached 121 million yuan. Within the territory