When I was very young, I never dreamed when I slept. I slept until dawn. Even if you knocked a gong in my ear, I would still sleep. But ever since I graduated and started teaching, I have been dreaming about it. Ever since I woke up from a dream that one of my students failed the exam, I haven't had a good night's sleep. I used to watch Xiao Cui talk about insomnia in "To Tell the Truth", and I also said that these people with insomnia are too busy, so why can't they fall asleep? Later, after I personally experienced insomnia, I really felt that insomnia was really painful! I can't sleep well every night, I have no energy during the day, and I don't have the energy to do anything. My brain is not full, and my memory is getting worse and worse. The most painful thing is that I have to stay in bed for an hour or two every night before I can fall asleep. I am very easy to wake up. If there is any disturbance, I will wake up and I will never be able to sleep again. I also have all kinds of unexpected dreams. It's fun to write them down and see what's going on in my mind at night.