1.Let the anesthesiologist really master you. The anesthesiologist will often visit you the day before the operation, which is the most important part of his/her —— is to fully grasp your condition. Therefore, you should not have too many worries, and you should tell us about your disease development, past history, allergy history and so on (our anesthesiologists will ask and listen to you in detail). Physical preparation: Including self-adaptation and tolerance improvement, etc. (e.g. quit smoking for 4 to 8 weeks). (e.g. quit smoking for 4 weeks to 8 weeks, exercise to relieve urination and defecation in bed, etc.) 3. Mental preparation: This is very important. We often do not understand the medical knowledge and there is fear, anxiety and so on. First of all, you have to believe in your choice! Believe your doctor! Believe your doctor to give you guidance! Pro-tip: allow yourself to be nervous in order to make yourself more released!