We are too easily influenced by the outside world to concentrate on things. I have surveyed that people have an average concentration of less than 8 seconds. I have objections to this. It should be more than that, but it is true that we cannot maintain very efficient and focused efficiency in our usual work. After a while, I looked at the phone, looked at WeChat, looked at Taobao, swiped Weibo, answered the phone, and went back in the morning to find that I did n’t do a few things and passed. This is also my very depressed state. I will prepare for some time in the future. Invest in learning how to study and work efficiently. We can use this procedure to be a master of time management, but not a slave of time.