In fact, when you study with your tutor, do you feel like a migrant worker or a student? See what kind of mentality the individual is! Learn knowledge and do things in a down-to-earth manner, and you won't complain about anything. Don't be swayed by considerations of gain and loss! If you always have a lot of prejudice in your mind and can't calm down, you will naturally be upset, especially when doing experiments. What do you think you can learn by yourself? In fact, graduate students are like carpenters with apprentices. How much you can learn is your own business! Postgraduate entrance examination is like a master taking an apprentice! "the master leads the door, and the practice is in the individual"!