The semi-dome is the symbol of Youshan Meidi National Park. It is the highest peak in Youshan Meidi at an altitude of nearly 3000 meters. It is named because its top is a semi-circle. The northwest wall of the semi-dome is a vertical plane about 600 meters long with a slope of 93 (%). It is one of the most challenging rock climbing sites in the world, so Yosemite National Park attracts a large number of professional climbers.