Ma Yueling has only one book about the wisdom of not getting sick. Only four books have been written so far. I really can't stand the answers from many people below, so let's talk about it. Needless to say, liars in the world, often the news we see on TV is false, and teachers' medical treatment is false. There's nothing we can do, right? Actually, is Ma Yueling a liar? You can buy this book "Liar" and have a good look. There must be evidence when forging. After reading it, if you are a little patient and do something, you will know whether this "liar" is cheating you or whether the doctor in the hospital is cheating you. Use your own wisdom, don't follow the trend, since you doubt it, verify it. Maybe it will help you one day. Speaking of eating loach, there are actually many precautions in it. Go and see for yourself. I am the beneficiary of Ma Yueling's regimen, and I am very grateful to her. But I used to be a skeptic.