To identify the authenticity of Yan Shi Mei's Refreshing Purifying Toner, you can pay attention to the following details:

1. Shake the bottle vigorously and observe the foam produced. If the foam is fine, rich, and lasts a long time, it's real. On the contrary, if the bubble is very big and disappears quickly, it is fake.

2. Check whether there are anti-counterfeiting marks on the bottle, such as anti-counterfeiting QR code, anti-counterfeiting coating, etc. If there is no anti-counterfeiting mark on the bottle, or the anti-counterfeiting mark can be easily scratched off, it may be fake.

3. Smell the toner. If it is genuine, it will have a very refreshing smell and will not have a pungent smell of alcohol. If the smell is unpleasant, it's probably fake.

4. Observe the color of the toner. The Refreshing Purifying Softening Toner is transparent and colorless. If the color is off or the color changes after being stored for too long, it may be fake.

5. Observe the sealing condition of the bottle. If the bottle is tightly sealed and there are no signs of air or liquid leakage, it's probably genuine. On the other hand, if the sealing condition is poor, it is probably fake.

The above methods are only for reference and cannot guarantee 100% accuracy. If you have a dedicated channel to purchase products, or buy from official websites, you can reduce the risk of buying fakes. If you have any questions about the authenticity of the product, it is recommended that you contact Yanshimei’s customer service for consultation.