Good sleep habits are very important for our health and study. When we have enough sleep time, our bodies will get a proper rest and prepare for the next day's work. So we will be full of energy all day and get ready for everything. If we don't sleep well, we will be so sleepy that you can't concentrate on your study. As a result, you can learn nothing in a day. As for me, I often go to bed at 22 o'clock and get up at 6 o'clock in the morning. That is to say, I have 8 hours of sleep time, so I am healthy and energetic every day and prepare for my study.