First, there is an imbalance between the growing demand of a small number of bodybuilders and the backward equipment of most gyms. The second point is that the backward operation mode of most gyms can't meet the increasing rent and the cost of supporting facilities. The third point is that more and more gyms spend a lot of money on imported equipment, but the details are not enough, for example, dumbbells are too small, barbell pieces are too few, and there is no weightlifting platform.