需要教师有较高的文化程度、教学经验及综合素质。但笔者在调查过程中发现，

Teachers need to have a higher education level, teaching experience and comprehensive quality. However, during the investigation, the author found that the three companies rarely introduced teachers' information when they promoted their products. Through analysis, it is found that the main reasons are as follows: first, in order to retain teachers, companies usually do not report on teachers publicly; second, the teaching level and experience of online teachers are quite different.

Teachers are required to have a higher level of education, teaching experience and comprehensive quality. However, the author found in the investigation process, three enterprises in the promotion of products, rarely introduce teachers related to the situation. Through the analysis, it is found that mainly due to the following reasons: First, enterprises in order to retain teachers, so usually do not publicly report the situation of teachers;

Teachers are required to have higher education level, teaching experience and comprehensive quality. However, the author found that in the process of the investigation, the three enterprises rarely introduced the relevant situation of teachers when they publicized their products. Through the analysis, it is found that the main reasons are as follows: first, in order to retain teachers, enterprises usually do not report the situation of teachers publicly; second, the teaching level and experience of online teachers are quite different.