The first thing you need to pay attention to is color. Whether it is genuine or not, the color of the product is white, but it is crystal clear. Another authentic Hainan Yangshengtang VE bottle has anti-counterfeiting code. You can see the first color change. If it's the tag itself, whether it's metal or other telephone inquiries, you can access the query results of Yangshengtang official website by checking the security code and security code (18 bits) on the tag.