1 First, check whether the product has the logo of Leofoo and the golden seal, which is the logo of Leofoo.

2. Secondly, check whether the certificate contains Leofoo's name, product number, weight, color and other information, as well as the test results and seals of relevant international departments.

3. Finally, log in to official website, Leofoo or official website, Chow Tai Fook, enter the certificate number, and inquire about the authenticity and detailed information of the certificate.