Yunguan is under Wu Moutnain. When you across the stone gate and up more than 500m, you will enter into a narrow rod of more than 160 stone steps. On the top, there is an arch of 30m high and 4m wide, called Stone Gate Building. The lintel of the cave gate, there is and inscriptions on precipices of four characters - "Dong Nan Ping Zhang".  The mountains here are peculiar, and the situation is dangerous. On the both sides, there are Tianjiang Peak, Toad Peak, Wanghai Lion and so on.