The production date of Master Kong iced black tea is generally in the bottle cap with black font. If there are ghosts or spaces here, it may be that the date inkjet printer has dialed the wrong number, which is generally more common. Another reason is that you may have bought a fake.

The way to distinguish the authenticity of Master Kong iced tea: First, look at the production date, not too long ago. Secondly, it depends on the bottle cap, which does have adhesion. Really iced tea bottles are better. Then look at whether there are sundries in the drink, and finally look at the brand and whether there is a quality certification mark.