The main purpose of the in-post teaching practice is to promote the students' practical knowledge, strengthen their teaching skills, and gradually form the professional moral quality of the interns. All this is generated by teaching and reflections. The interns need self improvement, master the focus of teaching, understand the education theory and teaching objectives, reflect after each class on the differences between a beginner and a master, and further improve their teaching skills. At the same time, the interns should have occupational feelings, a sense of accomplishment and self-efficacy, a positive career self-awareness, and professional moral quality.