Introduction to Immortal Cave: Immortal Cave, also known as Immortal Cave, is located on the north side of the main peak of Guanshan Mountain, facing the East China Sea. There are two caves in the stone cave, the upper and lower caves are about 3 meters apart. It is said that Zhang Liang and Xu Shu got their name from the ancient times when they practiced here and became immortals. There are remains of immortals in the lower cave.