Los Angeles (US: /lɔːs ˈændʒələs/ (listen) lawss AN-jəl-əs;[a] Spanish: Los Ángeles [los ˈaŋxeles], lit. 'The Angels'), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world's most populous megacities. Los Angeles is the commercial, financial, and cultural center of Southern California. With a population of roughly 3.9 million residents within the city limits as of 2020, Los Angeles is known for its Mediterranean climate, ethnic and cultural diversity, being the home of the Hollywood film industry, and its sprawling metropolitan area. The city of Los Angeles lies in a basin in Southern California adjacent to the Pacific Ocean in the west and extending through the Santa Monica Mountains and north into the San Fernando Valley, with the city bordering the San Gabriel Valley to its east. It covers about 469 square miles (1,210 km2), and is the county seat of Los Angeles County, which is the most populous county in the United States with an estimated 9.86 million residents as of 2022.
Dari County, under the jurisdiction of Guoluo Prefecture, Qinghai Province, is located in the southeast of Qinghai Province and in the south of Guoluo Tibetan Autonomous Prefecture at the junction of Sichuan, Gansu and Qinghai provinces. It is bordered by Jiuzhi County in the east, Banma County in the southeast, Seda County in Sichuan Province in the south, Shiqu County in Sichuan Province in the southwest, Maduo County in the northwest, and Maqin and Gande counties in the north across the Yellow River. The county has a total area of 16466 square kilometers and has jurisdiction over 9 townships, 1 town, 33 animal husbandry committees, 109 animal husbandry cooperatives and 1 poverty alleviation association, with a total population of more than 30, 000 people (2013). Dari County, with an average elevation of more than 4200 meters above sea level, belongs to an alpine and semi-humid climate, and is one of the natural ecological protection and management areas of the "three Rivers Source". At the same time, it is also an important commodity in Guoluo Prefecture, second only to the location of the prefecture (Dawu), the distribution center of Chinese and Tibetan medicinal materials and Qingchuan Jiao.