Hongbo is relatively good. In the past, some students went to Baiyi, and some went to Shan Academy of Sciences. We get together and discuss the mode of class. We all agreed that Hongbo was good, and some students changed halfway. In fact, the key is to rely on yourself. Even if the teacher speaks well, you don't work hard. As long as you listen a little in class, you will be extremely relaxed after class. That won't do unless you have a good foundation.