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.
Shuangliao City, a county-level city under the jurisdiction of Jilin Province, is administered by Siping City. it is located in the southwest of Jilin Province and in the west of Siping City. it is located in the confluence area of the eastern and western Liao River in the west of Jilin Province. it has sufficient heat, abundant light and less precipitation throughout the year; it has jurisdiction over 6 streets and 12 townships, covering an area of 3121.2 square kilometers, with a total population of 420000 in 2016. Shuangliao City is located in the border of Horqin grassland adjacent to northeastern Liaoning and eastern Inner Mongolia, and is the junction of Jilin, Inner Mongolia and Liaoning provinces. Shuangliao is famous for its "chicken singing and smelling three provinces". As early as the ancient "Yuping soil and water in Kyushu", the ancestors of the Chinese nation thrived on the land of Shuangliao, which is an intertwined land of nomadic culture and farming culture. Li Fuchun, Tao Zhu, Huang Kecheng, Lu Zhengzao, Deng Hua, Yan Baohang, etc.