Introduction to Guyang Cave: Guyang Cave is located in the southern section of Longmen Mountain, also called Laojun Cave. It was excavated in 493 AD. It is the earliest cave among the statues of Longmen Grottoes, with the richest Buddhist content and the highest calligraphy art. . It is dug out of a natural limestone cave. There is no lotus caisson on the top of the cave and the ground is horseshoe shaped.