In fact, the quality problem is very difficult to solve. Instead of trying to solve it from the customer's point of view, try to solve it from another angle. Then the focus of the problem appears, and all the sports equipment you buy can be of good quality and cost-effective. You can ask which brand of bicycle is good, such as Bh and Li Jian, and which brand of treadmill is good, such as Musen and Zhengxing. I hope I am satisfied.