1. From the text and code identification: genuine brand packaging plastic bags have the word Mengniu, and dairy packaging has the code and shelf life. You can know the authenticity of the brand by scanning the code or checking with the headquarters.
2. Distinguish from the production date: At the bottom of the package, there is the production date of concave-convex printing. If the brand production date is flat, you may have bought fake milk by accident.
3. Identification of printing process in the previous year: whether the printing process on the package is vague or the picture is out of line, whether the production date is clear, and if the handwriting image is clear, it is genuine.