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.
Liannan Yao Autonomous County is located in the northwest of Guangdong Province, north of the Tropic of Cancer, between latitude 24 °17 °16 "- 24 °56 °2" north and longitude 112 °2 °2 "- 112 °29 °1" east. It is bordered by Lianzhou City in the northeast, Yangshan County in the southeast, Huaiji County in the south, Lianshan Zhuang and Yao Autonomous County in the west, and Jianghua Yao Autonomous County in Hunan Province in the northwest. There are 71 village neighborhood committees in 7 towns (Sanjiang, Zhaigang, Damashan, Xiangping, Daping, Wushui, three rows). The county seat is located in Sanjiang Town. After the opening of National Highway 107, the county seat is 236 kilometers away from Guangzhou Highway and 120 kilometers away from Pingshi Railway Station. The Yao people live in 80% of the county, and there are Yao villages everywhere on the high mountains and mountains.