Zhu Danxi, one of the Jin and Yuan dynasty's famous traditional Chinese medicine doctors, thought that stasis and phlegm were the important causes of stroke. The properties and characteristics of the Yin-Yang, left-right, Qi-blood, liver-lung were analyzed and the theory of "ascending of Yin and descending of Yang", "liver belongs to the left and lung belongs to the right ", "blood belongs to the left and Qi belongs to the right " were combined. Finally, we summarize the point of "stasis belongs to the left and phlegm belongs to the rig...