When beer was born, there was no label, so the brewer engraved a label on it to avoid being different from other brewers' wines. Now the beer label has the manufacturer, telephone number and manufacturer address.

The marking method of production date is not limited to the fixed place on the bottle body, as long as it does not leave the bottle body, it meets the requirements.

It may be worn off or it may be on the certificate. If not, it is an unqualified product.