Tianshui is the second-largest city in Gansu Province, China. The city is located in the southeast of the province, along the upper reaches of the Wei River and at the boundary of the Loess Plateau and the Qinling Mountains. As of the 2020 census, its population was 2,984,659 inhabitants, of which 1,212,791 lived in the built-up (or metro) area made of the 2 urban districts of Qinzhou and Maiji. The city and its surroundings have played an important role in the early history of China, as still visible in the form of historic sites such as the Maijishan Grottoes. History Qin, whose House of Ying were the founding dynasty of the Chinese empire, developed from Quanqiu (present-day Lixian) to the south. After the invasions of the Rong which unseated the Western Zhou, Qin recovered the territory of Tianshui from the nomads. It became an important region of their duchy and, later, kingdom. Characteristically Qin tombs have been excavated at Fangmatan nearby, including one 2200-year-old map of Qin's Gui County. Under the Qin Empire, the area was part of Longxi Commandery but the Emperor Wu of the Han separated the region as the Tianshui Commandery in 114 BC as part of his expansion towards the Tarim Basin. The general Li Guang came from the city. The Han conquests and explorations eventually resulted in the development of the Northern Silk Road: Tianshui formed its junction with the Wei River, after which it followed the road past Mount Long to Chang'an (present-day Xi'an). Nearby are the Maijishan Grottoes, filled with thousands of Buddhist sculptures representing figures such as Buddha and the original male form of Guanyin, produced between the Wei and Song dynasties by monks travelling along the road and by local Buddhists. During the Northern Wei, the city was known as Hanyang and was the center of the Hanyang Commandery. During the Western Wei, this name was changed to Hanyang County. During the Tang and Five Dynasties, the city of Tianshui was known as Shanggui (). It alternated with Chengji (present-day Qin'an) as the capital of the province of Qinzhou (). Li County was separated from Tianshui's jurisdiction during the ninth year of Chenghua (AD 1473) during the Ming dynasty. According to a legend, the name Tianshui (天水) originates from a lake formed from heaven, which would remain the same size year round. Subdivisions Geography Tianshui is located in the valley of