Introduction to the Terracotta Immortal Cave: There is also the largest karst cave in Zhongdian in the Shangri-La Grand Canyon - the Terracotta Immortal Cave. There is a footprint on the stone wall at the entrance of the cave, with all five fingers, which is regarded as a rare and strange sight in the world. Legend has it that Xiluosangbo, a disciple of Tibetan Buddhism who disobeyed his master's orders and forcibly opened the cave door. In order to keep the Bodhisattva in the cave who was about to leave because the cave door was opened early, he led many believers to dance the Guozhuang Dance in front of the cave, and finally stayed. The Bodhisattva lives. Since then, the 15th day of the twelfth lunar month has become a festival for Tibetan people from Yunnan and Sichuan to gather and dance in front of the Immortal Cave. Beautiful songs echo one after another in the Shangri-La Grand Canyon.