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.
Jilong County is located in the southwest of Tibet Autonomous region and southwest of Xigaze City, with geographical coordinates ranging from 84 °35'E to 86 °20 °E and 28 °3'to 29 °3'N. It is bordered by the Kingdom of Nepal to the south and southwest, with a border of 162 km, bounded by the Brahmaputra River to the north and Sagar County to the north, and Nieramu County to the east. The county government is stationed in Zongga town. One river and two rivers (Yarlung Zangbo River, Donglin Zangbo River, Jilong Zangbo River) run through the whole territory, with about 300 square kilometers of Jilong basin. Jilong County has jurisdiction over 2 towns and 4 townships, with a total area of 9300 square kilometers. The total population is 10,000 (2003). In 2005, the county's GDP actually completed 101.16 million yuan. In 2017, Jilong County withdrew from poor counties (districts).