First of all, you need to pay attention to the color of the product. The real color is not white, but crystal clear. In addition, every bottle of authentic Hainan Yangshengtang VE has an anti-counterfeiting code. First of all, you can observe whether the label itself has color change and metallic feeling. In addition, you can query the query code on the anti-counterfeiting label through the mobile phone. There is a string of numbers (18-digit security code) after tearing the security code, which can be found in official website of Yangshengtang.