San Jose,[A] officially San José (/ˌsæn hoʊˈzeɪ, -ˈseɪ/; Spanish: [saŋ xoˈse]; Spanish for 'Saint Joseph'),[B] is a major city in the U.S. state of California that is the cultural, financial, and political center of Silicon Valley and largest city in Northern California by both population and area. With a 2020 population of 1,013,240, it is the most populous city in both the Bay Area and the San Jose-San Francisco-Oakland Combined Statistical Area, which contain 7.7 million and 9.7 million people respectively, the third-most populous city in California (after Los Angeles and San Diego and ahead of San Francisco), and the tenth-most populous in the United States. Located in the center of the Santa Clara Valley on the southern shore of San Francisco Bay, San Jose covers an area of 179.97 sq mi (466.1 km2). San Jose is the county seat of Santa Clara County and the main component of the San Jose–Sunnyvale–Santa Clara Metropolitan Statistical Area, with an estimated population of around two million residents in 2018.
Haixi Mongolian and Tibetan Autonomous Prefecture, Qinghai Autonomous Prefecture, referred to as Haixi Prefecture, is located in the north of the Qinghai-Tibet Plateau and the west of Qinghai Province, with high terrain in the northwest and low in the southeast, which is a typical alpine and dry continental climate zone; the state has a total area of 300700 square kilometers and has jurisdiction over 3 county-level cities, 3 counties and 1 administrative region; in 2017, the resident population is 515200. Haixi Mongolian and Tibetan Autonomous Prefecture is the Qudi of the Qinghai-Tibet Plateau, with Tibet in the south, Gansu in the north and Xinjiang in the west. It is at the center of the confluence of the four provinces and regions of Qinghai, Gansu and New Tibet, and was once the auxiliary road of the ancient "Silk Road" leading to the Western region. Lanxila optical cable, Qingxin optical cable, Qinghai-Tibet 750 kV AC / DC interconnection line run through the whole territory, Golmud-Lhasa product oil pipeline and Xianning-Lanlan gas pipeline are distributed, Qinghai-Tibet railway and national highway.