Yes, this ancient foot sticker is a famous liar. The inferior mats processed by black workshops are all made up. This is just a chemical reaction, which is not only useless but also harmful to health. Many people have been cheated. They mainly brainwash people by pyramid schemes, saying that they will make you rich under the banner of health preservation. In fact, to put it bluntly, they are taking your money, and they are making a fortune. They are old tricks.