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.
Dulan County is located in the southeast of Haixi Mongolian-Tibetan Autonomous Prefecture of Qinghai Province. Dulan (which means "warm" in Mongolian) has a total area of 45270 square kilometers. As of 2013, the total population was nearly 100000. Mainly Han nationality, as well as Tibetan, Mongolian, Hui, Turkish and other ethnic minorities. The county people's government is stationed in Cn Wusu Town, 205 kilometers away from Delingha, the state capital, and 428 kilometers from Xining, the provincial capital. Dulan County is located in the southeast corner of Qaidam Basin. The whole territory can be divided into two geomorphological types: Khan Buda Mountain area and Qaidam Basin Plain. Gobi, desert, valley, rivers and lakes, hills, plateaus, mountains and other topography are distributed in turn. There are more than 40 rivers, such as Shaliu River, Tuoso River, Cn Wusu River and so on. It belongs to the arid continental climate of the plateau, with an average annual temperature of 2.7 ℃ and a minimum extreme temperature of-29.8.