Delete the faces that are created inside the mesh at the area of symmetry for the character (this is created during the extrusion process).
在我们进行镜像之前，删除模型内侧的面，(这是在挤出过程中创建出来的。)
2
The karst area of Longxitang in the western part of Hunan is controlled by ne extrusion rupture so the karst growth is very uneven, the rupture itself has poor condition for storing water.