There is a way to distinguish whether it is pure grain wine or alcohol blended wine.

Take a drop of white wine and put it in the palm of your hand, then cross your hands to make them touch, and rub them hard a few times. If the heated wine smells fragrant and smells bad, it is the real pure grain wine; If blended with edible alcohol, it not only smells bad, but also tastes short and tasteless after a while.