There will be more content to answer this question. Just say one thing. To communicate with the guests, we need to know the basic knowledge of fitness, and then we should be able to ask the guests open questions. What is an open question, that is, guests can freely express their own questions. For example, what do you think of fitness? You have a good idea. What made you learn to keep fit? This kind of question can make the customer tell his own things, so that you can find his needs and give him satisfaction when the customer answers. Instead of just saying how good and cheap our project is. This is only said if the guest has a clear intention. There will be a lot to say about this, so I can only say these first.