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.
Lixin County, which belongs to Bozhou City, Anhui Province, is located in the south of Bozhou City, Woyang County in the north, Mengcheng County in the east, Fengtai County in Huainan City in the south, Yingshang County in Fuyang City, and Yingdong District and Taihe County in Fuyang City in the west. The total area is 1950 square kilometers. Lixin County has Wu she mound, Zen Yang Temple, Yinyang City, Jijia Pagoda, Jixiaofang and other ancient sites. Qingyin Opera, pull Soul Opera, Huaibei Dagu and Zhangou Jiuqu Yellow River Lamp Array are listed as the intangible cultural heritage of Anhui Province. In 2018, Lixin County has jurisdiction over 20 towns and 3 townships, and there is another park with a total registered population of 1.733 million, achieving a GDP of 23 billion yuan, of which the added value of the primary industry is 4.91 billion yuan, the added value of the secondary industry is 6.65 billion yuan, and the added value of the tertiary industry is 11.44 billion.