There are black spots on the gas cylinders of Maotai Festival.

I want to ask why there are black spots on Maotai's gas saving cylinders. This is punch. There are small black spots on the bottle of Maotai, which belongs to perforated wine. Punched wine means that counterfeiters uncover the label on the real wine bottle, drill a pinhole on the wine bottle with professional equipment, input other cheap wine by infusion, then block the pinhole with porcelain powder, re-label it, and then pretend to be genuine Moutai.