A Study on Inner alchemy of Nanzong Xiandan School

At that time, the alchemy of Painan Sect was developed on the basis of the theory of burning at that time, so both the application of concepts and the specific cultivation methods were more or less related to burning at that time. The early practice of inner alchemy is very similar to the refining of outer alchemy, such as emphasizing the temperature difference of drugs, taking specific substances in the body as medicinal materials, and carrying out fire annealing according to specific divination and changes in solar terms. The middle and lower two of the three kinds of alchemy mentioned in Xiuxian Dialectics belong to this kind of alchemy: "Chinese medicine alchemy takes liver, heart, spleen, lung and kidney as medicinal materials, and the year, month and day are annealed by fire." At that time, the concept of Danfa, a Sect of Nanzong, continued to use these drugs, but its meaning was very different from its original intention.

Then Nanzong opposed the idea of taking medicinal materials as individual vessels and fire as a specific time. The theory of cultivating immortals and distinguishing doubts says: "Do you know that chaos is not divided? When there is no day, before parents are born, there is no essence, no blood and no meat?" The specific time such as year, month and day and the acquisition of tangible objects such as essence, blood, gas and liquid are the basis for returning to people.