Introduction to the stone carvings of the alchemy furnace: 1000 meters east of Shanghang, there is a pile of huge stones with a natural shape. The inscription is "Alchemy Furnace" and the inscription: Zhao Guolin, the Guisi year of Kangxi. It is said that the stone at this moment is the place where the founder made elixirs in Yuanxu during the Wanli period of the Ming Dynasty.