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.
Guangning County, which belongs to Zhaoqing City, Guangdong Province, is located in the central and western part of Guangdong Province, in the middle reaches of Suijiang River, a tributary of Beijiang River. Located in the one-hour living circle of the Pearl River Delta, it is one of the main passageways for Guangdong Province to travel to and from the Pearl River Delta by land from the nearest mountain counties in Guangdong Province and Guangxi, Hunan and other provinces. It is about 122.7 kilometers away from Guangzhou, and runs through the Erguang Expressway and Guiyang-Guangzhou High-speed Railway. The administrative area of the county covers an area of 2455 square kilometers and has jurisdiction over 15 towns. in 2017, the county has a registered population of 589300. During the reign of Jiajing in the Ming Dynasty, riots occurred year after year in the northwest of Sihui County (now Guangning). In the thirty-sixth year of Jiajing, he successively led the Ming army to suppress the chaos. In the thirty-eighth year of Jiajing, Che Sihui County was home to Guangning County. With the meaning of broad peace, Guangning was established. After its establishment, it still belongs to Zhaoqing Prefecture. one