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.
Qingshui County, under the jurisdiction of Tianshui City, Gansu Province, is located in the southeast of Gansu Province, northeast of Tianshui City, Niutou River Basin, a tributary of the Weihe River on the north bank of Longshan, southwest of Longshan; Longxian County, Baoji in the east, wheat accumulation area in the south, Qinan County in the west, and Zhangjiachuan Hui Autonomous County in the north; it is located in the transitional zone from Longshan Mountain to Longxi Loess Plateau, with temperate continental monsoon climate; it has jurisdiction over 15 towns and 3 townships with a total area of 2012 square kilometers. The total population in 2018 is 332364. Qingshui was called Shangfu in ancient times and got the name of the county from "four Notes of Qingquan". It is the birthplace of Huangdi Xuanyuan, the first ancestor of Chinese humanities, the birthplace of Qin unified China, and the hometown of Zhao Chongguo in the Western Han Dynasty. Prehistoric culture, pre-Qin culture, Han and Tang culture, Song (Jin) and Yuan culture accumulation; the territory has been identified by the State Administration of Cultural relics as "Wei and Jin ancient city" and "not"