Artemisinin is extracted from the Artemisia annua plant, which is found along the Jiujiang River and is not widely cultivated, but wild Artemisia annua can be found everywhere. From a botanist's point of view, Artemisia annua is a very common class of plants of the Asteraceae family with a distinctive odor. After research, Tu Youyou found that artemisinin should be used to fight malaria by "twisting the juice" instead of the traditional "boiling the medicine", because high temperature may destroy the efficacy of the drug. Accordingly, Tu Youyou changed to use ether, which has a boiling point of only 53℃, to treat Artemisia annua, removing the ineffective acidic part of Artemisia annua and retaining the effective neutral part of Artemisia annua, and the efficacy of Artemisia annua was obviously improved. After that, she followed the modern pharmacology and chemistry methods, and went through the strict pharmaceutical process of purification, animal experiments, determination of chemical structure, analysis of toxicity and efficacy, animal experiments, clinical experiments, and so on, to purify the "Artemisinin".