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.
Baqing County, which belongs to Naqu City, Tibet Autonomous region, is located in the eastern part of Naqu City on the North Tibetan Plateau and in the South Qiangtang Great Lake Basin area in the upper reaches of the Nujiang River. the terrain is high in the north and low in the south, with an average elevation of more than 4500 meters. The main peaks in the territory are Bujia Mountain in the east, Mount Wamara and Mount Zhuluo in the north, Canglaishan and qu Rula in the northwest. Baqing County belongs to the semi-humid monsoon climate zone of the subcold zone of the plateau, with annual sunshine hours of about 2402 hours. Baqing County covers an area of 10326 square kilometers, with a total population of 42356 (2010). It has jurisdiction over 3 towns, 7 townships, 3 communities and 158 administrative villages.