With the outbreak of the covid-19 around the world, our routine life is very much changed. In order to prevent further infection, we choose to stay at home taking online courses, which is a real challenge for those who lack self-discipline. Take me for example. I have to get up before 6:30 and get ready for my class beginning at 7. After more than 10 hours’ learning online, I get quite tired, but I have to work hard on my homework until 11 o’clock at night. As you see, staring at the screen for such a long time does great harm to our eyes. Still, I want to express my heartfelt thanks to my teachers and parents alike for what they have done for me.