1. China article coding center: inquire about product bar codes and relevant product information databases at home and abroad through China article coding center.

2. official website: You can inquire through official website. Liangpin Store has set up a special anti-counterfeiting inquiry page in official website, where consumers can inquire about the authenticity of products by inputting anti-counterfeiting codes or scanning QR codes.

3, product packaging: good shop production date will be printed on the packaging, you can check the specific production date according to the date.