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.
Gangnan District is under the jurisdiction of Guigang City, Guangxi Zhuang Autonomous region. it is a county-level district established after the prefecture-level Guigang City was established in 1996. It is located on the banks of the Yuhe River in the Xijiang Valley of the Golden Waterway, southeast of Guigang City, on the south bank of Yujiang River, adjacent to Xingye County in the east, Pubei County in the south, Hengxian County in the west, and Gangbei District and Guiping City in the north. In the southern part of Hong Kong, there are double tracks of Li-Zhan Railway and National Highway 324, Nanning-Guangzhou Expressway runs through the whole territory, and the Xijiang River in the golden waterway flows through four villages and towns in the area, and it can pass through thousand-ton freighters all the year round, directly to Guangdong, Hong Kong and Macao. It is an important transportation hub in Guangxi and an important channel for the export of materials in the southwest. By the end of 2010, Hong Kong South District has a total area of 1089 square kilometers and has jurisdiction over 6 towns, 2 townships and 1 street, 165 village committees with a population of 635600.