Yungang Grottoes have many unique places because of their unique geological characteristics. He is not as hard as Luoyang Longmen Grottoes, so many of the caves need to be built outside to restore the temple appearance. These sheds are not designed to be beautiful, but to protect the buildings and artworks in each grotto from damage. So the restoration and protection of the grotto is really a very important thing, and the same is true of the 17 grottoes.