After washing your face, gently and slowly exfoliate with fine salt or remove oil and blackheads.
After drinking milk, you can cover your face for a few minutes, wash it and whiten it.
Eat less black things, especially soy sauce and coffee! ! Easy to get dark.
2 lose weight: drinking soup before eating can make you feel full, so you won't eat too much because you are too hungry.
I have tried all these myself, and it doesn't cost much to have an effect.