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.
Langkazi County, which belongs to Shannan City, Tibet Autonomous region, is located in the northern foothills of the middle Himalayas in southern Tibet, bordering the Kingdom of Bhutan, in the southwest of Shannan City, 227 kilometers away from Zedang Town, Nadong District, Shannan City. It is bordered by Cuomei and Zahang County in the east, Jiangzi County, Kangma County and Renbu County in Xigaze City in the west, Luoza County and the Kingdom of Bhutan in the south, and Nimu County in Xigaze City and Qushui County in Lhasa City in the north. The county has a total land area of 8109.23 square kilometers, a water area of 1054 square kilometers, a cultivated land area of 36000 mu and a grassland area of 6.8 million mu. The border line is 25 kilometers long, with an average elevation of 4500 meters. The total population is 34767 (2010). It has jurisdiction over 2 towns, 8 townships and 113 villages. It is not only the highest county in Shannan City, but also in Tibet.