On the fourth day of practicing Qigong, I still stayed in Dantian, and I was thirsty to urinate and drink water at night. What's the matter?

The reason is that you care too much about "qi". In fact, there is no need to care about these tingling and rising heat feelings. It's just that the power of the mind has an effect on the qi and blood in the thinking part. Impatience and high expectations make you hot and dry, so thirst makes you hot and dry. This is the taboo of practicing qi. Without a stable mentality, just expecting these specious feelings will not achieve much. The real qi is not qi, but more like light (you will understand when you can see it later, but don't care too much. 100 qigong masters won't see it, only 10 ordinary practitioners are under a few years old. Therefore, if you want to practice Qigong without high consciousness, it will be a long and busy road, so be patient. Most people are impatient, always hoping that these touches will become stronger and feel that their qigong is growing. This is not right. At first, you will have these feelings, but they will soon change. The specific changes will vary from person to person. In short, these touches do not mean that your practice is growing. I don't think it's meaningful to stick to the abdomen or a certain part. At most, it is to strengthen the blood circulation of these parts, which is helpful to the health of this part. Qigong really practices the energy and ability of the mind, and many actions are just to guide the mind. Because of the guidance and direction of the mind, it is difficult for people to exercise completely through consciousness, so they need to follow actions, guide them with actions, and "stick to it."

In short, from what you said, it is the result of being upset and impatient, which is the taboo of practicing Qigong. In addition, it seems that you are also in the basic learning stage, and you can't reach the stage of meditation and conception. Therefore, when practicing, consider how to relax the body and relax the consciousness, and in the early stage, eliminate distractions as the main practice. The rest is slowly realized. If you really have patience, long-term peace of mind, peace of mind and confidence, you should gain something during this period.