Ge Hong wrote "Bao Puzi's Inner Chapter", "On the immortal prescription, ghosts change, preserve health and prolong life, praying for evil but causing trouble, which belongs to Taoism." Among them, the content of elixir is mainly concentrated in three volumes: elixir, elixir and Huangbai. The volume "Then" introduces the method of refining and then taking it. The volume of "Fairy Medicine" is devoted to the medicine for prolonging life. The volume "Yellow and White" introduces the refining method of fake gold and silver. Ge Hong not only summarized the predecessors' achievements in elixir, but also creatively developed elixir. He was a master of elixir in the Han, Wei and Jin Dynasties both in theory and in practice.