According to some laws of TCM health preservation, the triple energizer meridian is the season from 9: 00 pm to 1 1, which takes care of all the internal organs in the abdomen and detoxifies the body, so you can sleep at 9: 00 pm at the earliest.

You can't sleep after 1 1 at the latest, because in the morning 1 1 to 1, when the gallbladder meridian is in season, it is the yang meridian, which will cheer you up, so you will feel sleepy at nine or ten o'clock in the evening, but people will cheer up immediately after eleven o'clock in the evening. But this is terrible. 1 1 always don't sleep after, it will hurt the gallbladder and affect the liver.

For your reference.