The main thing is to look at the printing process on the packaging, whether there is ambiguity or the picture is out of line, and whether the production date is clear. If the handwriting image is clear, it will be genuine.
P.S. Don't worry, Mengniu milk is so bad that no one will copy it. Maybe the imitation is better than the genuine one. Haha, just kidding, Mengniu milk, Telunsu and Jin Dian are ok.