Chengkan, alias Longxi, Bagua Village. Huizhou District, Huangshan City, Anhui Province. It is a national AAAAA-level tourist scenic spot, Jiangnan No. 1 Village, the township of ancient Chinese architecture, and the best tourist township in Anhui Province. Located in the south of Huangshan Mountain, adjacent to the east and the county, bordering Qiankou Town in the south, and connecting to Xixi South Town and Qishe Township in the west, and Fuxi Township in the north. Chengkan according to the "Yijing", "yin (kan), Yang (cheng), two gas unified, heaven and man in one" gossip feng shui theory site layout, surrounded by mountains and rivers, forming three streets, ninety-nine lanes like a maze. The most complete ancient villages in the Ming Dynasty in China, there are more than 150 historical and ancient buildings such as Song, Yuan, Ming and Qing, including 49 of which are key cultural relics protection units nationwide.