Introduction to Purple Smoke Stone: Purple Smoke Stone is located at the east foot of Sanqing Mountain and west of Tianmen Peak. The stone is 3 meters high and 1568 meters above sea level. It is said that during the Jin Dynasty, Li Shangshu once cast an iron furnace here to make alchemy and practice Taoism. The stone was covered by the purple smoke of the alchemy furnace. Xun, so it is also called incense burner stone. It is an excellent place for viewing. From here, you can see the Sanqing Palace scenic spot in front of you.