F chest is completely useless. Now the health care products market is full of false advertisements. After you buy it, customer service will help you contact a consultant or teacher to guide you to use it. At first, you will say that your mammary duct is blocked, thymocytes are underdeveloped, and so on. Then after you buy another product once, there will be a section chief and so on, which will make you spend a lot of money to solve the old routine. To put it bluntly, it's all a scam. Remind you again that ZDY only has one set of weight-loss exercises. There is no such thing as you said. She made it public herself. Health is the greatest capital. Don't try to be cheated. Thank you.