Fitness instructors will involve selling classes in their daily work, but this does not mean that fitness instructors are selling. Professional and experienced fitness instructors don't need to publicize their classes at all, so many members line up to study. In order not to go out to distribute leaflets and sell classes every day, I went to the Asian Institute of Physical Fitness to study private education and learned a lot. Now I work in a gym, so many members take the initiative to buy classes, but I don't take the initiative to promote them.