1) "Note on the theory of typhoid fever": pungent and sweet dispersal, cinnamon sticks, licorice of pungent and sweet, to disperse the fire in the meridian; astringent can be removed from the astringent, dragon bone, oyster, in order to astringent floating over the positive qi. The astringency of dragon bone and oyster is used to collect the positive qi that is floating over. (3) Selected Ancient Formulas: Gui Zhi, Gan Cao, Long Bone and Oyster, the meaning of which is based on the solidity and astringency of dragon and oyster. It is still labeled as cinnamon and licorice, because the medicine of yin bluntness is not effective without Yang medicine. Therefore, the pure yin of dragon bone and oyster must be based on the clear yang of Gui Zhi and Gan Cao, and then it can be introduced into the meridian, converge the fire of floating over, and suppress the machine of the dead yang.