If you like friendliness in any industry, if you don't like it in your heart, everything you do will be counterproductive, especially when you didn't achieve anything in the early stage. The prospect is also that there are people who do well and do poorly in any industry, which is normal. Finally, the fitness industry is also a chain of equipment manufacturing and sales places or network operation fitness instructors ... with a lot of division of labor. Don't think, don't know how to think. If you are interested, act immediately and practice your true knowledge. This is your own. All right, come on.