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.
Tianshui, a prefecture-level city under the jurisdiction of Gansu Province, is located in the southeast of Gansu Province, adjacent to Guanzhong Plain. It is an important node city of Guanzhong Plain Urban agglomeration and the sub-core city of Guanzhong-Tianshui Economic Zone. Tianshui, once known as Shangli, Chengji and Qinzhou, is said to be the birthplace of Fuxi and Nu WA, one of the important birthplaces of Chinese civilization, known as "the hometown of Emperor Xi". Tianshui has jurisdiction over 2 districts and 5 counties, with a total area of 14325 square kilometers and a total population of 3.829 million, including 3.3549 million permanent residents (2018). Tianshui is high in the northwest and low in the southeast, with an elevation of 1000-2100 meters above sea level. The climate is temperate monsoon climate. Tianshui is a famous historical and cultural city in China, an excellent tourist city in China, and one of China's old industrial bases. It has national and provincial enterprise technology centers and engineering.