How to judge gender and age just by looking at the face?

Not to brag, I usually judge a person's age with my eyes, and the error is not less than 2 years old.

Look at men and women, basically the same. Specifically, the hairstyle does not mean the number of white hair (white hair is younger now, and hair is dyed), the outline of facial features, the years will be printed on the face, wrinkles and depth are one of them, the figure (focusing on the waist circumference, women should also look at the chest, especially in summer), walking posture, dress and costume (different age groups, different clothing styles), and women also look at her first jewelry and listen to the timbre (young, young)

Observe the above with your own eyes and make a comprehensive judgment. You can guess the approximate age in less than 3 minutes.

Someone should have a similar method with me. Try it if you don't believe me.