There is an essential difference between students and observation. For example, students generally refer to people who study in institutions of higher learning, middle schools, schools or training courses other than primary schools, that is, they go deep into them and study in them, so what they learn depends on their personal potential. As the name implies, observation is a course that can be watched, studied and pondered. Generally, it is an open class, an excellent class and a demonstration class. There must be a lot worth learning and discussing. Therefore, if you don't go deep, you will learn less.