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.
Yuecheng District, Shaoxing City, Zhejiang Province, is located in the west of Ningshao Plain and the northern foot of Huaiji Mountain. In 490 BC, Yue King Gou Jian moved the capital and built the city. Huiji County in Qin Dynasty and Yuezhou in Tang Dynasty once became the temporary capital of Southern Song Dynasty and the place where King Lu supervised the country at the end of Ming Dynasty. It was the earliest birthplace of the Chinese nation and the most developed area of Xianyue culture. It has a long history and rich historical and cultural resources. Shaoxing was liberated in May 1949, and Shaoxing City (county-level city) was established, followed by Shaoxing County and Shaoxing area, which is the seat of Shaoxing County and Shaoxing District Administrative Office. In July 1983, Yuecheng District was established in Shaoxing City, which is now the seat of Shaoxing Municipal Party Committee and Municipal people's Government and the political, economic and cultural center of Shaoxing City. Yuecheng District actually has jurisdiction over 5 towns and 12 streets, 10