It's true. According to the inquiry, he is indeed a master of drama in the open class. Open class is an organized, planned and purposeful formal and open course teaching activity for specific groups. The open class has a clear theme and a clear task. In addition to students participating in the class, leaders and other teachers also participate, which is a good opportunity for teachers to show their teaching level and exchange teaching experience. Open class is also enterprise-oriented, which is a course in which many enterprises participate and discuss the same theme.