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.
Kaijiang County, which belongs to Dazhou City, Sichuan Province, is located in eastern Sichuan, at the southern foot of Dabashan Mountain, Kaizhou District and Wanzhou District of Chongqing in the east, Liangping District in Chongqing in the south, Dachuan District in Sichuan in the west and Xuanhan in Sichuan in the north, with a total area of 1032.55 square kilometers. Kaijiang County, formerly known as Xinning County, has a history of more than 1450 years since the second year of the abolition of the Western Wei Emperor in the Southern and Northern dynasties (553). It has been named since August of 1914. There are intangible cultural heritages such as stubborn sticks, Gui Yangko, stonework, dragon dance, color pavilions, stilts and other intangible cultural heritages, as well as cultural relics and monuments such as Echeng Shanfan stele, gem old county dam, Shuangniushan, Rende Bridge and Baoquan Pagoda, which are famous cultural counties in Bashu. Gantang Hu Festival Xiaofang, Ren Shi Tao Pai Fang is the national key cultural relics, Gantang Huolong Lantern Festival has become the folk culture brand of Sichuan and Chongqing. Kaijiang is a revolution.