Yu Zhengxie was an important thinker in late Qing dynasty.Faced with the problems of the times,He carried on previous thinking,through the way of textual criticism to clarify the definition of the original meaning of“Teacher”and defined the professional content and professional norms of the“Teacher”.At the same time from the discussion of“respecting masters”and“master is respectable”,he reshaped the Ethical Relations between Teachers and Students,avoiding teachers’being treated as tools and the utilization of these relations.Yu’s disc...