Generally speaking, in the micro-lesson competition, there is no rule whether to show your face or not, which depends on the producer's screen recording method. If the teacher records the micro-lesson in the recording and broadcasting room and stands in front of the screen to explain, he will record himself. If he only uses PPT or engages in recording, there is no need to show his face.

In fact, it doesn't matter whether you show your face or not. What matters is that the micro-course explanation is interesting and clear, and it is good to have a sense of substitution. However, if the face value is high, you can show your face. After all, it is attractive.