A man named Zhu has a five-year-old son who has a fever at night and has nothing to do during the day. Some doctors treat typhoid fever, others treat fever and use cold medicine to relieve the superficial symptoms, but they have never been cured. The symptoms of the sick child are: drooling and drowsiness. Other doctors salivate with iron powder pills, but the condition is more serious. On the fifth day, I wanted to drink water very much. Qian Yi said: You can't use the rule of law. So he took one or two soups of Baizhu powder and three liters of water for the sick children to drink and take during the day. Zhu asked, "Don't you have diarrhea after drinking too much?" Qian Yi replied, "Unless raw water seeps in, you won't have diarrhea. Even diarrhea is not surprising, but the rule of law cannot be used. " The person surnamed Zhu asked again, "What disease should be treated first?" Qian Yi said: "This medicine is used to quench thirst, treat phlegm, reduce fever and clear the interior." In the evening, the medicine is estimated to be taken out. Qian Yi looked at the sick child and said, "You can take another three liters." Fried three liters of Baizhu powder, and the sick child felt much better after eating it. On the third day, he ate three liters of Atractylodes macrocephala powder, and the patient was no longer thirsty and drooling. Then Qian Yi gave him two doses of Ejiao Powder (also known as Bufei Powder and Bufei Ejiao Decoction), which was composed of Ejiao, Arctium lappa, Glycyrrhiza uralensis, Aristolochia, almond and glutinous rice, and the disease was completely cured.