Look at the packaging origin: At present, there are two leading brands in Ejiao market, Fupai Ejiao (Ejiao originated in Dong 'e Town, Pingyin County) and Dong 'e Ejiao (Xindong 'e County).
Second, look at the appearance. Authentic Fupai Ejiao is regular in shape, rectangular and flat, and does not deform. Especially the 500g hardcover Ejiao is the only 500g piece in Ejiao industry. Properly preserved, not deformed for more than ten years. This is because the authentic Fujiao materials are very exquisite and the processing technology is fine.
Third, look at the color. Authentic Ejiao has amber translucent edges and a shiny surface. After Fupai Ejiao is broken, the broken segments are also bright and the edges are bright and translucent;
Fourth, look at the texture, crisp, you can do experiments with your hands;
Five smells: put a small piece of donkey-hide gelatin into a hot water cup and cover it for 2 minutes. The donkey-hide gelatin in the cup will give off a gelatinous smell, which is tasteless or fishy.
Sixth, look at the solubility. Put a small piece of donkey-hide gelatin in hot water and it will dissolve in half an hour, otherwise it will be a fake.
Seventh, look at freezing property. Authentic Ejiao will form jelly after stewing and refrigeration, and there will be problems if it is not formed.