Introduction to Mengmen Yeyue: It is said that when Dayu was controlling floods, he first dug the first "Dragon Gate" dark hole to block floods here, which was called Mengmen. On the huge stone of Mengmen, there are four large one-meter-square vermilion characters written by Jinming County Magistrate: "Lie Zhen Kuangliu". When the river water drops, these four characters will appear on the water for tourists to watch.