The first stage, pre-job preparation stage. It refers to the retraining from the beginning of training in normal colleges to the beginning of new posts, and it is the reserve stage of teachers' roles.

The second stage, the introductory stage. It means that in the first few years of a teacher's term, new teachers strive for the recognition of students, colleagues, schools and educational administrators, and can reach a satisfactory level in dealing with daily problems.

The third stage is the stage of forming ability. This stage is a professional development stage of actively participating in training programs and various exchange meetings and actively accepting various new educational concepts.

The fourth stage, enthusiasm and growth stage. At this stage, teachers continue to pursue greater professional development and constantly seek progress.

The fifth stage is the stage of career frustration. At this stage, teachers' job satisfaction began to decline, and they experienced frustration and job burnout. Most of this stage occurs in the middle of career.

The sixth stage, stable and stop stage. At this stage, teachers have lost the requirement of progress, and their work is limited to their own duties, only satisfied with completing tasks, lacking enterprising spirit and high-quality requirements.

The seventh stage, the professional venting stage. At this stage, teachers taste the feeling of leaving their jobs with different feelings.

The eighth stage, the end of career. It is the stage of teachers' resignation and post-resignation, including both the resignation of retired teachers and the forced or voluntary suspension of work for various reasons.