A mesa is an isolated, flat-topped elevation, ridge or hill, which is bounded from all sides by steep escarpments and stands distinctly above a surrounding plain. Mesas characteristically consist of flat-lying soft sedimentary rocks capped by a more resistant layer or layers of harder rock, e.g. shales overlain by sandstones. The resistant layer acts as a caprock that forms the flat summit of a mesa. The caprock can consist of either sedimentary rocks such as sandstone and limestone; dissected lava flows; or a deeply eroded duricrust. Unlike plateau, whose usage does not imply horizontal layers of bedrock, e.g. Tibetan Plateau, the term mesa applies exclusively to the landforms built of flat-lying strata. Instead, flat-topped plateaus are specifically known as tablelands.
Hancheng is known as "Longmen", "Xia Yang" and "Shaoliang" in ancient times. Weinan City in Shaanxi Province is one of the important birthplaces of Chinese civilization and the hometown of Shi Sheng Tai Shi Company Ma Qian. At the beginning of the Western Zhou Dynasty, King Wu of Zhou sealed here, saying that South Korea, at the turn of the Spring and Autumn and warring States period, and King Zhou Ping, the son of Qin Zhong, was called Liang. During the warring States period, Qin established Xiayang County. Sui Kai Huang 18 years (598) home Hancheng County. It was changed to Hancheng City in January 1984 and was listed as an open city in Shaanxi Province in 1985. In 2006, it became the only city in Shaanxi Province that was awarded "China's Outstanding Tourism City" as a county-level city. In 2016, it was selected as the first batch of national global tourism demonstration zones. In 2017, it was selected as a national high-quality city demonstration city, the first batch of national food safety demonstration cities and national major municipal engineering leaders.