The wind box is the first gorge after entering the Qiantang Gorge. Because of the rapid speed of the boat, tourists are holding their heads and locking their eyes on the ancient hanging coffins that may appear on the cliffs on both sides. Now the three gorges still have few hanging coffins, only for preservation purposes, is also located on the rock wall of a very high distance, even if you look at it, it is only a little far away, it is really difficult to determine whether it is a prominent stone rock, or really hanging coffins.