1. Different professional identities: A coach is a profession that specializes in guiding, training and evaluating students or athletes, and plays the role of a coach in sports, education, training and other fields. A master is an identity, which refers to a person who has rich experience and skills in a certain field or industry and is willing to pass them on to his disciples.

2. Different responsibilities: The coach's main responsibility is to help improve the technical level, competitiveness and performance by making training plans, providing technical guidance and evaluating the performance of students or athletes. The master is mainly responsible for imparting his knowledge and skills in the field he is good at to his disciples, guiding them to become independent gradually and improving their work level.