Condition analysis: What we are talking about here is white vinegar, which is the kind of white vinegar sold in the market. But it is not only mixed with water, but also mixed with a certain proportion of glycerin, and then used to wash the face. To achieve the whitening effect, after washing the face, the facial skin will become elastic and shiny. But it should not be used for a long time, about once a week or two! Prevent allergies!