Nowadays people like to stay up late more and more, but sometimes they don't like it, just because they are used to it. No matter young people or middle-aged people, I think they sleep less and less, especially at night, and often play until eleven or twelve o'clock or one or two.

Although sleeping at this time has become a habit for them, it will not affect their life and work. However, their bodies are gradually being defeated by staying up late. Maybe they are still young, and we don't feel that our bodies can't support ourselves when we stay up late, but when we get old, our bodies will gradually show up.

Sleep is very important to us, especially if we have a high quality sleep. When we sleep, we should not only sleep well, but also get enough sleep and sleep at the right time.

I think when we are sleeping, the most important time is from 10 to around 7 am, which should be the best time. Almost eight or nine hours of sleep should be enough for many people. Even if you are tired during the day, it is enough to rest for nine hours at night.

But if you are a child in primary school, you should sleep more. In my primary and junior high school days, I went to bed at nine o'clock every night on time. Get up at seven o'clock the next morning. I think a normal day is really great.

Moreover, you should not only sleep for a long time, but also make yourself comfortable, so it depends on the quality of sleep at night. If the quality of sleep is not good, you can drink a cup of warm milk before going to bed at night to make yourself sleep better.