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, leaders and other teachers also participate, which is a good opportunity for teachers to show their teaching level and exchange teaching experience. At the same time, the open class is also enterprise-oriented, and it is a course in which many enterprises participate and discuss the same topic together.

As a form of teaching and research, open class has its value of existence and development. There should be original ecology, research and distinctive personality. Under the guidance of principled and methodological teaching comments, open classes can provide a solid step for teachers' professional growth.

The effect of open class and internal training class is different.

Internal training means that students are all from the same enterprise, and can be taught by people inside the enterprise or by people from external training institutions. The location, time and method of training are basically organized by the training enterprises themselves.

In terms of effect, the effect of internal training will be better, because the content of training is dominated by enterprises, and lecturers make course content according to the needs of enterprises. The content of the open class is fixed.