First, trainers are internal, teachers, instructors and the like, which is really an adult theory. Second, the promotion supervisor is engaged in both internal and external training, which belongs to the sales category. Wide contact, strong coordination, outstanding achievements, very training, and a set of marketing methods. Third, the trainer's job is relatively stable, with little risk. The promotion director has a bright future. When they reach a certain level, they can jump ship. But this requires courage, enthusiasm for work, and more courage. Good luck.