There are many positive comments and negative comments. In fact, it is normal to have negative comments. Even if it's really good, it can't benefit everyone. Some students who don't study well think that the money spent is not worth it. However, there are many good ones, such as Q, tuition fee 1.5 million, and it is only for our students who have studied FX, and nothing outside is accepted. If the fundamental frequency is lower than a certain level, the effect is not good. Many students have learned it.