The plain face in a girl's mouth means not wiping things, not opening filters and so on. By plain face, boys mean painting light makeup. Let's take a look at the relevant knowledge. What's the difference between boys and girls without makeup?

Female netizen: Su Yan = no wiping+no filter+no contact lens+no semi-permanent makeup.

Plain face means that nothing is painted on my face at all. "My own understanding of plain face is that nothing is painted on my face at all", "As long as I don't wear makeup, it's actually plain face", and some female netizens pointed out in particular that using camera filters, wearing contact lenses, tattooed lips and misty eyebrows can't be regarded as plain face, "you can't wear contact lenses because you are poor" and "plain face"

Male netizen: Su Yan = good-looking+wearing light makeup.

The definition of male netizens is relatively loose, "misty eyebrows are ok, others call it makeup", and some male netizens point out the cruel fact that "most boys want element makeup: good-looking+light makeup", and many male netizens reveal that "in fact, I have never understood whether there is makeup" and "who can tell whether there is beauty in the lens", so I simply can't tell whether there is plain makeup; However, some male netizens insisted that "my understanding of Su Yan is just to dry up after washing her face" and "the real Su Yan is just the appearance of washing her face".