Huaifu's yam powder is real. Relevant information shows that the brand of Huaifu family belongs to the legally registered brand of Qinyang Zhongde Huaiyao Co., Ltd. and has a formal and legal business license. Qinyang Sino-German Huaiyao Pharmaceutical Co., Ltd. enjoys the reputation of four treasures of traditional Chinese medicine at home and abroad. There are purple spots on the surface of Huaifujiashan powder, like rust, and the thumb is thick and occasionally thick. Take two pieces and collide with each other to make a clang. Like two iron bars, it won't break. Other yams are not as dense as iron bars. If you know this, you can pinch it with your hands, and it won't crush. Although common yam is strong, it will be crushed.