The basic requirements for trainers before training are as follows: (1) Make preparations. One day before the class starts, you should check the loose-leaf paper, student handbook, projection and other materials used for teaching. (2) Decide how to group students. We should consider how to create the most effective learning environment by grouping. People in the same department or unit should avoid being in a group. (3) Consult the information mentioned in the Trainer's Guide and make a choice according to the situation of the trainees. Think about what questions students might ask and what might happen from their point of view. Check the timetable and leave room.