Purple shale is distributed widely in the Hengyang region.Because of historical causes

ecology of the region has been destroyed and soil has been lost seriously.In order to renew the structure of ecology

to exploit theeconomic perspective of the shale

to transform the scenery and topography and to utilize the shale

some 1.8-metre-depth and 1.6-metre-diameter cavities were created using the blast ing method.Then

through conserving soiland water

improving soil and choosing suitable trees and grasses

ecology of the shale may be const ructed rapidlyin central Hunan Province.In the mean time

by special blast ing

shaping the mountains and designing the manmadescenery with natural scenery combined

scenery of the shale may be constructed rapidly.