The way to identify: fake packaging compared to the real thing, the color is lighter, and the real thing's anti-counterfeiting mark with a light blue as the background color, the fake one is light yellow.
Then look at the glue board, the real glue board bright color, fake glue board dull color; real glue board on the "Dong'a Colla Corii Asini" four words written in red cinnabar, bright color, immediately dissolved in water, while the fake glue on the word is written in paint, dull color, the water is very difficult to dissolve, there is oily; secondly, the real glue has a faint fragrance, while the fake glue has a light yellow color. Faint fragrance, while the fake gum has a stink similar to poor-quality ink; in addition, the real gum is more brittle, a shot that is broken, fake gum is harder; the real gum dissolved liquid is clear and not cloudy, while the fake gum is difficult to dissolve, and there are impurities and sediments.