The spleen and stomach are vital to the human body. Chinese medicine describes it as the source of food and grass, so it is the source of biochemistry, once the spleen and stomach problems, the body is full of diseases. The herbs that nourish the spleen and stomach, the one I value the most, is Chinese yam. I often encounter children who are weak, and when the wind blows, other children in the kindergarten have no problems, but this child will catch a cold. According to Chinese medicine, the spleen and stomach are earth and the lungs are gold, and earth produces gold. Therefore, for such children, my experience is: after the child is well adjusted to the cold, it is best to use Chinese yam, usually 30 grams, with six grams of fried chicken internal gold, boil water, drink two or three days, do not have to drink more, with this dietary treatment to strengthen the spleen and stomach. This way the child will not enter a situation where the cold is just fine and then it comes back in a few days. Because if at this time, we do not take the time to tonify the spleen and stomach, but just clean up the external evil with medicine to expel it, the righteousness will still be insufficient and the external evil will come back at any time, so I would advise parents to handle it this way. Sometimes, after a cold, some children will have a cough that lingers for two or three months, so I will observe whether the child has a deficiency of positive qi. After boiling the water, remove the dregs, and whenever the child drinks water, drink this yam water for three days, and most coughs will disappear immediately. This method is called cultivating earth and generating gold in Chinese medicine, which means that when the spleen and stomach qi are strengthened, the lung qi will also become strong and will expel the external evil.