The authenticity of the product is approved by the state, and it is fake if it is not approved; Look at the trademark and patent of the product, whose trademark it is. If there is a patent, you will know who the patent is. According to the above problems, it can be determined that Jiangxi or Henan, two countries of origin, have not approved production, so they are fake. However, the brand of Kangmeidan belongs to only one company, and buyers can check which brand belongs to which is genuine.