The difference between genuine and fake Biyinlefen trademarks can be determined from the following aspects:

1. Collar mark stitching: The two ends of the authentic Biyinlefen collar mark are fixed with sutures. It's clean and flat, while the fake collar tag's corner stitching is crooked and wrinkled.

2. Fixed sutures: The fake ones only sew the upper two ends, while the lower genuine ones have the four corners sewn. With such fixed sutures, fakes will have the problem of exposed threads. Genuine needle angles are very fine and there will be no threads.

3. Origin mark: The origin mark of genuine products is added below the collar label, but the origin mark of fake products is sewn directly under the collar label of genuine products.

4. Font: The first row of thombrown on the collar label, the three letters t, h, and e are the focus. The horizontal line above the authentic t is very distinctive, and the middle is concave, but the fake Although the T of the product is not flat, it does not protrude upward. The leg on the right side of the genuine product is slightly tilted inward, but the leg of the fake H is vertical. Finally, there is e. The letter e is also different, so you can observe it carefully.

5. Product instructions: The color of the genuine product is white, while the color of the fake product is yellow.

6. Smell: After smelling the genuine product, it smells of alcohol, which is very strong and obvious. If it's a fake, it's just an ordinary scent.

7. Bottle label: After the authentic seal is torn off, there will be no traces on the bottle cap and it will not feel sticky. But after the fake product is torn open, there will be traces sticking to it.

8. Fluorescence reaction: Fake products have fluorescence reaction, but genuine products do not.