It is a natural opening, the wind passes here, increase the speed, even when the wind is very small, the wind is blowing strong wind. It is the black wind outlet known as Changbai Mountain. It is windy and windy for many years. When the top of the mountain blows to the fifth wind, the wind roars here, flying sand and stones, the tourists can't stand at all, they can only climb to the wind mouth. But at the wind mouth, you can enjoy the whole picture of Changbai Waterfall!