Huangshan Mountain's first line is under Wenshu Cave. In Dengyuping Road, after careful slope and Duxian Bridge, there is a narrow and long stone alley with two walls, which is only 2 meters wide and only0.5 meters narrow. There are more than 80 levels of the middle tray, which can only allow one person to pass. Although walking is difficult, the landscape is strange and worth seeing!