As the saying goes, people live a breath, and the theory of Chinese medicine is: keeping in good health means nourishing qi, and people need yin and yang to be healthy! Midnight 12 is the time point for the handover of yin and yang, and it is the best time to replenish vitality (that is, yang)! Every night 10 to 3 am is the best time to sleep, and it is also the best time for human body to make blood, restore the functions of various organs, replenish yang, relax body and mind, and eliminate fatigue. Chinese medicine says staying up late is tantamount to wasting your time in hematopoiesis! If we keep a normal biological clock, it will bring us many benefits. Modern people have great pressure in life, busy work and many social activities. Few people work at sunrise and rest at sunset, but they can't completely break away from this primitive and healthy lifestyle! Nothing is more important than having a healthy body! In the past, the savings accumulated conscientiously were not enough to pay for the treatment, but now it is not worth the candle! I hope you don't make the same mistake as me. These are my personal views and suggestions on this matter. Of course, everyone's situation is different, and the degree of physical fatigue resistance is also very different. In short, I hope you will carefully consider and weigh the pros and cons! After all, this is three years of day and night upside down, not three days.