1. Go to official website, China Item Coding Center, and click "Barcode Information Inquiry" in "Utilities" on the left.
2. Enter "Barcode Information Inquiry" and select "Domestic Barcode Information Inquiry".
3. Enter the "Domestic Barcode Information Inquiry" and inquire about the authenticity of the barcode according to the specific information.
Mobile phone users can also download the client and scan the query with their mobile phones, which is the most convenient. I hope the above information can help you solve the problem. Please feel free to let me know if you have any other questions.