Kao Chen is the brand of live courses for college students in China. From 20 15, the online course of College English Band 4 and Band 6 was launched. In addition to CET-4 and CET-6 courses, online courses such as Exam for Postgraduate Entrance Examination, IELTS and TOEFL have quickly become the star products of the industry. There are indeed many classes in the examination of Chen. The courses in his family are all live courses, and dozens of students study together. I feel that I mainly listen to the teacher's basic information and some examination skills and methods, and there are not many opportunities for interactive practice.