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.
Luozha County belongs to Shannan City, Tibet Autonomous region, which means "Southern Great Cliff" in Tibetan. It is located in the south of the Tibet Autonomous region and at the southern foot of the Himalayas. The central part of the county is a grand canyon-Luozhagou, which is one of the border counties of the Tibet Autonomous region. The border line is 200 kilometers long. It is adjacent to Cuomei County and Cuona County in the southeast, Langkazi County in the northwest and the Kingdom of Bhutan to the south. In 2014, the total land area of the county was 5570.3 square kilometers. The water area is about 400 square kilometers. It is rich in water conservancy, wind and solar energy resources. The total population of the county is 20,000 (2014). It has jurisdiction over 2 towns and 5 townships. In 2012, the county's GDP reached 270.18 million yuan, 1.7 times that of 2010. Loza ("Southern Great Cliff" in Tibetan) is located south of the Himalayas.