First, look at the wine label, the information on the label does not match the real, this is fake wine, no matter if the wine in the bottle is not real wine, he is also fake wine. An example is that I have seen the Bordeaux region produced Syrah, a look is fake, because there is no Syrah in Bordeaux, so even if the wine is real he is also fake.

The second case is that I have also seen the wine label written Languedoc, but also written Bordeaux, so it is also fake, belong to the confusion of the region.

The above two cases need some knowledge to avoid.

The third is a good wine bottle filled with low-grade wine, this situation requires you to buy from their own trusted dealers. For example, some fake Lafite will be filled with Duchamelon wine, Duchamelon is a fourth-class winery, Lafite is a first-class winery, people who do not know much about wine can not drink it.

So look at the label and buy from someone you can trust to avoid fakes