In terms of health, it is better to sleep at night 10. Huangdi Neijing said: People lie in blood and return to liver. 23: 00 am 1: 00 am is the time for liver repair and detoxification. Even if they sleep for 24 hours after this time, they can't make up for these two hours. 5: 00 to 7: 00 is the best time for defecation, and 7: 00 to 9: 00 is the time for breakfast. At night, it goes up and Yang goes down, so