Your friend is right. At night, 1 1 is the best rest time for the human body, that is, don't stay up late. Staying up late is bad for people, especially girls. If you don't sleep at this time, your skin will be dry, your face will grow spots, and you will be tired the next day. If you can't sleep, it is recommended to drink a glass of pure milk every night. If you really can't, be uncle sheep!