Second, online resources are compli

Second, online resources are complicated, especially because there are many unhealthy websites. It is difficult to ensure that students are not affected by adverse resources, and some students may even indulge in it. Some online courses often do not have teacher guidance, and 100% rely on students to learn by themselves. Without proper guidance from teachers, students ’failure or ineffective learning may be exacerbated. The last is not conducive to the emotional communication between teachers and students. There is the possibility of emotional indifference and situational variation in network learning.