Teaching is easy to understand and easy to understand. Learning and thinking. Teacher Li Longhui's content is particularly good, and he is a very powerful teacher. The thinking is clear, the knowledge points are always explained in essence, the lectures are more interesting, the teaching level is very high, and the teaching is easy to understand and thorough. When listening to online classes, you should choose a teacher who is suitable for your own teaching mode, and pay attention to taking notes when listening to classes. If you have any difficult questions, you can ask the teacher through online channels.