1. First of all, look at the packaging. Whether it is the outer paper packaging or the can packaging, it has its own logo. It has its own trademark on it, and the company code can be seen in the tank code.

2. Secondly, look at the color and observe after opening the can. Real cans are golden in color, consistent in size, complete in shape, and have a well-rounded core.

3. Finally, smell the fragrance. Good cans have an inherent fragrance when they are opened.