The medical expert Gong Tingxian of the Ming Dynasty proposed the "Nine Essentials" for patients' self-cultivation, which is in line with the scientific principle of treating diseases and safeguarding health. When choosing a wise doctor, one must be cautious and follow through life and death. If one is willing to take medicine, all diseases can be cured. But if one is foolish, one's own family will be delayed. Early treatment is advisable. At the beginning, it becomes easier. If one is not cautious, hard ice will come. If you keep your room empty, you will naturally be free from illness. But if you do so, even the most skilled doctors will be powerless. The Five precepts are anger. One must reflect on it and realize that when anger arises, it is hard to save. For the six breaths of delusion, one should rest quietly. Once the false thoughts are eliminated, the spirit will naturally feel refreshed. There are seven dietary adjustments. If you overdo it, it will harm your spirit. Eating too much is hard to control. Be cautious about your daily routine and avoid socializing. If you engage in excessive physical labor, your vital energy will become increasingly weak. Do not believe in evil. If you do, you will fall ill. Heresies deceive and mislead others