Looking at the scenery and sights, now the scenery on the road is more and more into people's lives. All kinds of thoughts and going are getting closer and closer to us. But it is really surprising and novel to go to the underground of Qilu earth "through the center of the earth". The Canyon is a shocking landscape, besides, it "moves" to the underground, we are traversing the earth's core, to appreciate the subterranean Grand Canyon's elegance.